Epidemiology and Health

Original Article

Preventable cancer cases and deaths attributable to deficit of physical activity in Korea from 2015 to 2030: Soseul Sung, Sungji Moon, Jihye An, Jeehi Jung, Hyeon Sook Lee, Youjin Hong, Sangjun Lee, Woojin Lim, Kyungsik Kim, Inah Kim, Jung Eun Lee, Sun Ha Jee, Aesun Shin, Ji-Yeob Choi, Sun-Seog Kweon, Min-Ho Shin, Sangmin Park, Seungho Ryu, Sun Young Yang, Seung Ho Choi, Jeongseon Kim, Sang-Wook Yi, Yoon-Jung Choi, Jeong-Soo Im, Hong Gwan Seo, Sohee Park, Kwang-Pil Ko, Sue K. Park; Epidemiol Health. 2025;47:e2025010. Published online January 27, 2025; DOI: https://doi.org/10.4178/epih.e2025010

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Abstract Summary PDF Supplementary Material: Abstract
OBJECTIVES
This study aimed to determine the population-attributable fractions (PAFs) of cancers using various calculation methods and to estimate the PAFs of cancer incidence and mortality resulting from deficit in physical activity (DPA) from 2015 to 2030, based on data on prevalence rates.
METHODS
The PAF of cancer was estimated using a cohort study-based meta-analysis of relative risk (RR), national prevalence rates of DPA from 2000 to 2015, and national cancer statistics from 2015 to 2030, with a latency of 15 years.
RESULTS
In 2015, DPA contributed to 909 cancer cases and 548 deaths, accounting for 0.42% and 0.68% of new cancer cases and deaths, respectively. By 2030, the PAF values are expected to increase to 1.31% of incidence and 1.80% of mortality, with a continual increase from 2015 to 2030. When the low metabolic equivalent of task (MET) criteria were selected, the PAF values decreased for both incidence and mortality. The PAF calculated with <900 MET-min/wk for the sex-specific MET criterion was higher than that calculated with <900 MET-min/wk for both incidence and mortality.
CONCLUSIONS
The risk of cancer associated with DPA is expected to rise in both male and female. Future research and strategies should emphasize the promotion of physical activity for cancer prevention, considering its significant implications for public health.; Summary

Korean summary
2015년 신체활동 부족(deficit in physical activity, DPA)에 의한 인구집단기여분율(population-attributable fraction, PAF)은 암 발생 0.42%(909건), 암 사망 0.68%(548건)였으며 2030년에는 각각 1.31%, 1.80%로 증가할 것으로 예측됨. 남녀 모두에서 DPA로 인한 암 부담이 증가하고 있으므로, 암 예방을 위한 신체활동 증진 전략을 강화할 필요가 있음.

Key Message
In 2015, deficit in physical activity (DPA) accounted for 0.42% of incident cancers (909 cases) and 0.68% of cancer deaths (548 deaths), with population-attributable fraction (PAF) values projected to rise to 1.31% for incidence and 1.80% for mortality by 2030. The cancer burden attributable to DPA is increasing in both sexes, underscoring the need to strengthen population-level physical-activity promotion for prevention.

Systematic Review

The effectiveness of protein supplementation combined with resistance exercise programs among community-dwelling older adults with sarcopenia: a systematic review and meta-analysis: Phatcharaphon Whaikid, Noppawan Piaseu; Epidemiol Health. 2024;46:e2024030. Published online February 14, 2024; DOI: https://doi.org/10.4178/epih.e2024030

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Abstract Summary PDF

Abstract

OBJECTIVES
The combination of protein supplementation and resistance exercise shows promise for improving and maintaining muscle mass, strength, and performance in older adults with sarcopenia. This systematic review aimed to evaluate the effects of this combination on muscle mass, muscle strength, and physical performance in community-dwelling older adults with sarcopenia.

METHODS

We conducted a comprehensive search of 4 electronic databases: PubMed, Scopus, Embase, and the MEDLINE Library. The search covered literature from January 2013 to January 2023 and followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Two independent reviewers assessed the methodological quality of each study using the standard critical appraisal tool from the Joanna Briggs Institute (JBI). Meta-analysis was performed with the JBI Sumari program.

RESULTS

The review included 7 randomized controlled trials and 1 quasi-experimental study, encompassing a total of 854 participants aged 60 years and above. The study durations ranged from 10 weeks to 24 weeks. An analysis of standardized mean differences (SMDs) showed that protein supplementation combined with resistance exercise significantly increased muscle mass (SMD, 0.95; 95% confidence interval [CI], 0.13 to 1.78; p<0.05) and muscle strength (SMD, 0.32; 95% CI, 0.08 to 0.56; p<0.05).

CONCLUSIONS

Although the limited number of randomized controlled trials restricts the robustness of our conclusions, the evidence suggests that protein supplementation combined with resistance exercise is effective in enhancing muscle mass and strength in community-dwelling older adults with sarcopenia.

Summary

Key Message
Sarcopenia is a significant health concern. Given the contextual variations and the diverse factors that contribute to the prevalence of sarcopenia, delivering precision interventions to older adults diagnosed with sarcopenia who still reside in the community poses unique challenges. Therefore, precision interventions are vital for proper and feasible treatment planning, especially for early management actions, to reduce the impact of sarcopenia and its associated adverse effects in older adults. Our systematic review and meta-analysis showed that protein supplementation combined with resistance exercise is effective in enhancing muscle mass and strength in community-dwelling older adults with sarcopenia.

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Original Articles

The physical activity paradox in relation to work ability and health-related productivity loss in Korea: Heejoo Ko, Dohwan Kim, Seong-Sik Cho, Mo-Yeol Kang; Epidemiol Health. 2023;45:e2023096. Published online October 28, 2023; DOI: https://doi.org/10.4178/epih.e2023096

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Abstract PDF

Abstract

OBJECTIVES
The physical activity paradox suggests that occupational physical activity (OPA), unlike leisure-time physical activity (LTPA), may detrimentally impact health. We explored the relationships of OPA and LTPA with work ability (WA) and health-related productivity loss (HRPL).

METHODS

This study included 5,501 workers in Korea who were recruited in 2021 through a web-based cross-sectional questionnaire. The questionnaire was utilized to quantify OPA and LTPA in metabolic equivalents, while WA and HRPL were also measured. Non-parametric regression, using a generalized additive model (GAM), was employed to visualize the relationships of LTPA and OPA with WA and HRPL. Mean differences in WA and HRPL, in relation to OPA and LTPA, were examined using linear regression models. These models were adjusted for covariates including sex, age, body mass index, education level, alcohol consumption, smoking history, insomnia, occupation, hours worked, and income.

RESULTS

The GAM and linear regression analyses revealed that higher LTPA corresponded with higher WA and lower HRPL. In contrast, as OPA increased, WA decreased and HRPL increased. However, within the group with high OPA, HRPL was not significantly lower in the high-LTPA subgroup relative to the low-LTPA subgroup (mean difference=1.92%, p=0.343). This pattern was especially pronounced among workers aged 60 years and older, with an increase in HRPL observed with increasing LTPA among the respondents with high OPA.

CONCLUSIONS

High LTPA levels were associated with elevated WA and diminished HRPL. In contrast, higher levels of OPA were associated with lower WA and higher HRPL.

Summary

Citations

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Domain-Specific Physical Activity and Obesity Risk among Black Men in the United States: Evidence of a Physical Activity Paradox
Ailton Coleman, Jerraco L. Johnson, Jamila L. Kwarteng, Ahondju U. Holmes, Roland J. Thorpe, Elizabeth Heitman
Journal of Racial and Ethnic Health Disparities.2026;[Epub] CrossRef
Data profile: Korean Work, Sleep, and Health Study (KWSHS)
Seong-Sik Cho, Jeehee Min, Heejoo Ko, Mo-Yeol Kang
Ann Occup Environ Med.2025; 37: e3. CrossRef
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Trends in the effects of socioeconomic position on physical activity levels and sedentary behavior among Korean adolescents: Hunju Lee, Hyowon Choi, Sang Baek Koh, Hyeon Chang Kim; Epidemiol Health. 2023;45:e2023085. Published online September 8, 2023; DOI: https://doi.org/10.4178/epih.e2023085

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
We examined trends in physical activity and sedentary behavior in Korean adolescents, and their association with socioeconomic position (SEP).

METHODS

We used data from the Korea Youth Risk Behavior Survey, a nationwide study involving students aged 12-19 conducted between 2009 and 2021. SEP was assessed based on economic status, parental education attainment, and urbanization. Physical activity was categorized into vigorous physical activity, moderate physical activity, and muscle training, and sedentary time was also measured. We conducted the log-binomial regression to calculate prevalence ratios (PRs) and prevalence differences.

RESULTS

Our analysis included a total of 593,896 students. We observed an increasing trend in physical activity, but a worsening trend in sedentary behavior. A positive association was found between an adolescent’s physical activity and SEP indicators, except for urbanization. Adolescents with higher economic status engaged in more vigorous physical activity (high: PR, 1.26; 95% confidence interval [CI], 1.25 to 1.28; middle: PR, 1.03; 95% CI, 1.02 to 1.04). Similar associations were observed for father’s education (tertiary or above: PR, 1.11; 95% CI, 1.09 to 1.13; upper secondary: PR, 1.05; 95% CI, 1.03 to 1.07) and mother’s education (tertiary or above: PR, 1.17; 95% CI, 1.15 to 1.20; upper secondary: PR, 1.06; 95% CI, 1.04 to 1.08). Adolescents with higher economic status also showed a higher compliance rate with the guideline restricting sedentary time to 2 hours per day (high: PR, 1.28; 95% CI, 1.25 to 1.30; middle: PR, 1.03; 95% CI, 1.01 to 1.05).

CONCLUSIONS

Adolescents with higher SEP exhibited more physical activity and less sedentary time than those with lower SEP.

Summary

Korean summary
본 연구는 2009년부터 2021년까지 청소년의 사회경제적 지위가 신체활동과 좌식생활습관에 미치는 영향을 분석하였다. 청소년의 경제적 상태, 아버지와 어머니의 교육수준이 높을수록 청소년의 신체활동이 증가하고 좌식생활이 감소하였다. 그러나 청소년이 사는 지역의 도시화 정도는 영향을 미치지 않았다.

Key Message
This article analyzes the effects of an adolescent's socio-economic position on their physical activity and sedentary behavior from 2009 to 2021. The higher the adolescent's economic status, father's education, or mother's education, the more they engaged in physical activity and the less time they spent in sedentary behaviors. However, the level of urbanization in the area where the adolescent resided had no effect.

Citations

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Global trends in importance of 24-hour movement behaviors to pediatric health: implications for South Korea
Eun-Young Lee, Reyana Jayawardena, Seiyeong Park, Justin Y Jeon, Yeon-Soo Kim, Mark S. Tremblay
Clinical and Experimental Pediatrics.2025; 68(1): 16. CrossRef
Socioeconomic disparities in depression risk: Limitations of the moderate effect of physical activity changes in Korea
Su Kyoung Lee, Yong Jin Kwon, Zulkarnain Jaafar
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Trends in overweight and socioeconomic inequality among children and adolescents aged 7–18 years in China from 2010 to 2020
Zhidong Zhou, Jianhua Zhang, Chengyue Li, Yi Wan, Jianwu Liu, Tao He
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Analysis of Nutrition Knowledge After One Year of Intervention in a National Extracurricular Athletics Program: A Cross-Sectional Study with Pair-Matched Controls of Polish Adolescents
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Physical activity, sedentary behavior, and cardiovascular disease risk in Korea: a trajectory analysis: Jina Han, Yeong Jun Ju, Soon Young Lee; Epidemiol Health. 2023;45:e2023028. Published online February 22, 2023; DOI: https://doi.org/10.4178/epih.e2023028

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Abstract PDF

Abstract

OBJECTIVES
To identify the distinct trajectories of sedentary behavior (SB) and explore whether reduced cardiovascular disease (CVD) risk was associated with a distinct trajectory of physical activity (PA).

METHODS

We analyzed data from 6,425 people who participated in the Korean Health Panel Survey over a period of 10 years. The participants’ self-reported SB and PA were assessed annually, and trajectory groups were identified using a group-based trajectory model for longitudinal data analysis. Logistic regression analysis was performed to assess the association between CVD risk (10-year cumulative incidence) and the trajectories of SB and PA. The adjusted variables included socio-demographic factors, the predisposing diseases of CVD, and baseline health behaviors.

RESULTS

Trajectory analysis identified 4 SB trajectory groups: SB group 1 (low and slightly increasing trend, 53.1%), SB group 2 (high and rapidly decreasing trend, 14.7%), SB group 3 (high and slightly decreasing trend, 9.9%), and SB group 4 (low and rapidly increasing trend, 22.2%). The 3 PA trajectory groups were PA group 1 (moderate and slightly decreasing trend, 32.1%), PA group 2 (low and slightly decreasing trend, 57.3%), and PA group 3 (maintained inactivity, 10.7%). By the 10-year follow-up, 577 cases of incident CVD had occurred. We also noted a 50% reduction in the risk of CVD when SB group 4 was accompanied by PA group 1 (odds ratio, 0.50; 95% confidence interval, 0.28 to 0.90).

CONCLUSIONS

Despite increased time spent in SB, maintaining PA about 2 days to 3 days per week reduced the occurrence of CVD.

Summary

Citations

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Li-Hua Yu, Ge-Lin Zhang
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Ye Seul Yang, Eu Jeong Ku, Seung-Hyun Ko, Eun-Jung Rhee, Sang-Hyun Ihm, Sung Hee Choi, Won-Young Lee
The Korean Journal of Internal Medicine.2025; 40(5): 696. CrossRef
Physical activity for prevention of cardiovascular disease: a consensus statement of the Korean Society of Cardio-cerebrovascular Disease Prevention
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Cardiovascular Prevention and Pharmacotherapy.2025; 7(4): 120. CrossRef
Effects of physical activity and sedentary behaviors on cardiovascular disease and the risk of all-cause mortality in overweight or obese middle-aged and older adults
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Dynamic changes in clinical biomarkers of cardiometabolic diseases by changes in exercise behavior, and network comparisons: a community-based prospective cohort study in Korea: JooYong Park, Jaesung Choi, Ji-Eun Kim, Sang-Min Park, Joo-Youn Cho, Daehee Kang, Miyoung Lee, Ji-Yeob Choi; Epidemiol Health. 2023;45:e2023026. Published online February 16, 2023; DOI: https://doi.org/10.4178/epih.e2023026

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
Lifestyles, including exercise behaviors, change continually over time. This study examined whether the clinical biomarkers (CBs) related to cardiometabolic diseases (CMDs) and their relationships differed with changes in exercise behavior.

METHODS

The Ansan-Ansung cohort study (third to fifth phases; n=2,668) was used in the current study. Regular exercise behavior was investigated using a yes/no questionnaire. Changes in exercise behavior were classified into 4 groups: Y-N, N-Y, Y-Y, and N-N, with “Y” indicating that a participant regularly engaged in exercise at a given time point and “N” indicating that he or she did not. Fourteen CBs related to CMDs were used, and the associations between changes in exercise behavior and relative changes in CBs were examined. CB networks were constructed and topological comparisons were conducted.

RESULTS

Y-N was associated with increases in fasting blood sugar and insulin levels in men, and increased total cholesterol and low-density lipoprotein cholesterol levels in women. Meanwhile, N-Y was inversely associated with body fat percentage, visceral fat percentage, fasting insulin, and triglyceride level. Waist circumference played a central role in most networks. In men, more edges were found in the N-Y and Y-Y groups than in the N-N and Y-N groups, whereas women in the N-Y and Y-Y groups had more edges than those in the N-N and Y-N groups.

CONCLUSIONS

Consistent exercise or starting to engage in regular exercise had favorable effects on CBs related to CMDs, although their network patterns differed between the sexes.

Summary

Korean summary
한국 지역사회기반 코호트 자료를 이용하여, 운동 행태 변화에 따른 심혈관대사질환 관련 임상 생체 지표들의 변화가 남녀에 따라, 변화 행태에 따라 다르게 나타남을 확인하였다. 이런 변화와 차이는 네트워크 분석을 통한 구조적인 차이로도 확인되었다.

Key Message
This study examined that changes in the clinical biomarkers related to cardiometabolic diseases differed with changes in exercise behavior using a community-based prospective cohort study in Korea. Consistent exercise or change into exercise behavior had favorable effects on CB related to CMD, although their network patterns differed between the sexes.

Citations

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A 6-month exercise intervention clinical trial in women: effects of physical activity on multi-omics biomarkers and health during the first wave of COVID-19 in Korea
JooYong Park, Jaemyung Kim, Jihyun Kang, Jaesung Choi, Ji-Eun Kim, Kyung-Joon Min, Seong-Woo Choi, Joo-Youn Cho, Miyoung Lee, Ji-Yeob Choi
BMC Sports Science, Medicine and Rehabilitation.2024;[Epub] CrossRef

Associations of racial and ethnic discrimination with adverse changes in exercise and screen time during the COVID-19 pandemic in the United States: Tong Xia, Gilbert C. Gee, Jian Li, Xinyue Liu, Jin Dai, Lu Shi, Donglan Zhang, Zhuo Chen, Xuesong Han, Yan Li, Hongmei Li, Ming Wen, Dejun Su, Liwei Chen; Epidemiol Health. 2023;45:e2023013. Published online January 28, 2023; DOI: https://doi.org/10.4178/epih.e2023013

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
During the coronavirus disease 2019 (COVID-19) pandemic, a growing prevalence of racial and ethnic discrimination occurred when many Americans struggled to maintain healthy lifestyles. This study investigated the associations of racial and ethnic discrimination with changes in exercise and screen time during the pandemic in the United States.

METHODS

We included 2,613 adults who self-identified as non-Hispanic White, non-Hispanic Black, non-Hispanic Asian, or Hispanic from the Health, Ethnicity, and Pandemic study, a cross-sectional survey conducted among a nationally representative sample of United States adults between October and November 2020. We assessed self-reported racial and ethnic discrimination by measuring COVID-19-related racial and ethnic bias and examined its associations with changes in exercise and screen time using multivariable logistic regression models. We analyzed data between September 2021 and March 2022.

RESULTS

COVID-19-related racial and ethnic bias was associated with decreased exercise time among non-Hispanic Asian (odds ratio [OR], 1.46; 95% confidence interval [CI], 1.13 to 1.89) and Hispanic people (OR, 1.91; 95% CI, 1.32 to 2.77), and with increased screen time among non-Hispanic Black people (OR, 1.94; 95% CI, 1.33 to 2.85), adjusting for age, sex, education, marital status, annual household income, insurance, and employment status.

CONCLUSIONS

Racial and ethnic discrimination may have adversely influenced exercise and screen time changes among racial and ethnic minorities during the COVID-19 pandemic in the United States. Further studies are needed to investigate the mechanisms through which racial and ethnic discrimination can impact lifestyles and to develop potential strategies to address racial and ethnic discrimination as a barrier to healthy lifestyles.

Summary

Key Message
In this study with a nationally representative sample of Americans, we found that racial discrimination during the COVID-19 pandemic was associated with undesired changes in exercise and screen time, particularly among minorities.

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Addressing Racism and Discrimination in the Design of Physical Activity Interventions for Black Women: Insights and Recommendations From an Academic and Community Partnership
Rodney P. Joseph, LaTanya Mathis, Iyana Harris, Shawntele M. Howie-Carlson, Kanika Jones, Darlene Little, Dawn Augusta
Women's Health Issues.2025; 35(5): 301. CrossRef
Asian American Women’s Experiences of Discrimination and Health Behaviors during the COVID-19 Pandemic
Katarina Wang, Alice Guan, Janice Seto, Debora L. Oh, Kathie Lau, Christine Duffy, Esperanza Castillo, Valerie McGuire, Michelle Wadhwa, Clifford G. Tepper, Heather A. Wakelee, Mindy C. DeRouen, Salma Shariff-Marco, Iona Cheng, Scarlett Lin Gomez
Journal of Immigrant and Minority Health.2024; 26(2): 421. CrossRef
Facilitators, motivations, and barriers to physical activity among Chinese American women
Jingxi Sheng, Hao Lei, Demetrius A. Abshire, Horng-Shiuann Wu, Michael D. Wirth, Sue P. Heiney
Discover Social Science and Health.2024;[Epub] CrossRef
Social Determinants of Cardiovascular Health in Asian Americans: A Scientific Statement From the American Heart Association
Nilay S. Shah, Namratha R. Kandula, Yvonne Commodore-Mensah, Brittany N. Morey, Shivani A. Patel, Sally Wong, Eugene Yang, Stella Yi
Circulation.2024;[Epub] CrossRef

Associations between digital media use and lack of physical exercise among middle-school adolescents in Korea: Gyeongmin Kim, Hyunsuk Jeong, Hyeon Woo Yim; Epidemiol Health. 2023;45:e2023012. Published online January 10, 2023; DOI: https://doi.org/10.4178/epih.e2023012

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Abstract

OBJECTIVES
The reported effects of digital media overuse on physical activity among adolescents are inconsistent. This study examined the association between hours of digital media use and lack of moderate-intensity physical exercise (mPE) according to the type of digital media.

METHODS

This study included 1,837 middle school students from the iCURE (Internet user Cohort for Unbiased Recognition of gaming disorder in Early Adolescence) study conducted in Korea. Hours spent using digital media were measured by self-reported daily usage time for Internet games, messengers, social media, and watching game streaming on weekdays. Lack of mPE was defined as performing a minimum of 30 minutes at a time less than twice weekly. Multivariable logistic regression analysis stratified by sex was performed.

RESULTS

Among male students, the group with the highest hours of using either Internet games or watching game streaming was more likely to lack mPE than each non-user group. In contrast, among male students, the group using either messengers or social media had a higher rate of mPE compared to each non-user group. Female students showed no association between hours spent using Internet games, messengers, social media, or watching game streaming and a lack of mPE.

CONCLUSIONS

Among male middle school students in Korea, the excessive use of Internet games or watching game streaming was associated with a lack of mPE. Thus, guidelines should be established regarding adolescent use of internet games and watching game streaming.

Summary

Korean summary
한국에서 남, 여 중학생을 대상으로 4개 인터넷 매체(인터넷 게임, 메신저, 소셜미디어, 게임 스트리밍 시청) 과다사용과 신체 운동 부재와의 연관성을 알아보기 위한 단면조사 연구를 시행하였다. 남자 중학생에서 인터넷 게임 사용 또는 게임 스트리밍 시청 시간이 가장 높은 사분위 그룹은 비이용 그룹보다 중간 강도의 신체운동 부재율이 유의하게 높았다.

Key Message
A cross-sectional study was conducted to find out the relationship between excessive use of four Internet media (internet games, messengers, social media, and game streaming) and lack of physical exercise targeting male and female middle school students in Korea. Among male middle school students, the upper quartile group with the highest Internet game use or game streaming viewing time had a significantly higher moderate-intensity physical exercise absence rate than the non-use group.

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Religion and Social Media Use: Protective Factors for Youth Well-Being in the Digital Age?
Laura Upenieks, Terrence D. Hill
Journal of Psychology and Theology.2026;[Epub] CrossRef
Social Media Addiction and Cognitive Behavioral Physical Activity Among Adolescent Girls: A Cross‐Sectional Study
Ebru Sönmez Sari, Handan Terzi, Didem Şahin
Public Health Nursing.2025; 42(1): 61. CrossRef
Delineating temporal dynamics for the linkage between anxiety symptoms and problematic media use among Chinese adolescents
Hongjian Cao, Shaofan Wang, Nan Zhou, Ming-Chen Zhang
Journal of Applied Developmental Psychology.2025; 97: 101761. CrossRef
Online Risk Behavior in Adolescents: A Systematic Review
Lin Wang, Wanyi Wang, Wanyan Fei, Zhiyou Wang
Trauma, Violence, & Abuse.2025;[Epub] CrossRef
Bridging the urban–rural divide: digital literacy as a catalyst for enhancing physical exercise participation in China
Wangjie Li, Zhan Chen
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‘We wanted to spend more time with each other than with our phones’. Relationship between digital disconnection and physical activity of family members
Katarzyna Kopecka-Piech
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Yujin Jang, Youngmeen Suh
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Trends in the effects of socioeconomic position on physical activity levels and sedentary behavior among Korean adolescents
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Epidemiology and Health.2023; 45: e2023085. CrossRef

The associations of job strain and leisure-time physical activity with the risk of hypertension: the population-based Midlife in the United States cohort study: Xinyue Liu, Timothy A. Matthews, Liwei Chen, Jian Li; Epidemiol Health. 2022;44:e2022073. Published online September 7, 2022; DOI: https://doi.org/10.4178/epih.e2022073

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
Job strain is positively associated with incident hypertension, while increasing leisure-time physical activity (LTPA) can reduce incident hypertension. However, the joint associations of job strain and LTPA with incident hypertension among United States workers have yet to be investigated. This study examined the independent and joint associations of job strain and LTPA with incident hypertension.

METHODS

This prospective cohort study (n=1,160) utilized data from the population-based Midlife in the United States study. The associations of job strain and LTPA at baseline with incident hypertension during follow-up were examined using Cox proportional hazards models. High job strain was derived from a combination of high job demands and low job control, and high LTPA was defined as engagement in moderate or vigorous LTPA at least once per week.

RESULTS

During 9,218 person-years of follow-up, the hypertension incidence rate was 30.6 (95% confidence interval [CI], 27.3 to 34.3) per 1,000 person-years. High job strain was associated with a higher risk for hypertension than low job strain (adjusted hazard ratio [aHR], 1.29; 95% CI, 1.00 to 1.67). High LTPA was associated with lower hypertension risk than low LTPA (aHR, 0.77; 95% CI, 0.60 to 0.98). Hypertension risk was higher among workers with high job strain and low LTPA than among those with low job strain and high LTPA (aHR, 1.70; 95% CI, 1.18 to 2.43).

CONCLUSIONS

Job strain and LTPA showed positive and inverse associations, respectively, with incident hypertension. The combination of high job strain and low LTPA was associated with the highest risk for hypertension.

Summary

Key Message
High job strain and low leisure-time physical activity are independent risk factors for hypertension among workers, and those with high job strain and low leisure-time physical activity are at the highest risk, so it is critical that policy interventions target job strain and leisure-time physical activity to reduce hypertension.

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Adrian Loerbroks, Liwei Chen, Chunqing Lin, Kira Schmidt Stiedenroth, Jian Li
Psychiatry Research.2026; 358: 116983. CrossRef
Alternative Formulations of Job Strain and Sleep Disturbances: A Longitudinal Study in the United States
Yijia Sun, Megan Guardiano, Mayumi Saiki, Jian Li
American Journal of Industrial Medicine.2025; 68(3): 264. CrossRef
Dose–response relationship between leisure-time physical activity and metabolic syndrome in short sleep US adults: evidence from a nationwide investigation
Yanwei You, Hao Ding, Meihua Tang, Weizhao Wang, Ning Yan, Leizi Min, Yuquan Chen, Xindong Ma
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Prospective associations of occupational and leisure-time physical activity with risk of diabetes: a cohort study from the United States
Timothy A Matthews, Xinyue Liu, Liwei Chen, Jian Li
Annals of Work Exposures and Health.2024; 68(6): 581. CrossRef
The association between leisure‐time physical activity and cardiorespiratory and muscular fitness and job strain—Study with a Northern Finland birth cohort of 1966
Heli Kiema‐Junes, Aino Saarinen, Raija Korpelainen, Leena Ala‐Mursula, Maisa Niemelä, Vahid Farrahi, Mirka Hintsanen
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2023 ESH Guidelines for the management of arterial hypertension The Task Force for the management of arterial hypertension of the European Society of Hypertension
Giuseppe Mancia, Reinhold Kreutz, Mattias Brunström, Michel Burnier, Guido Grassi, Andrzej Januszewicz, Maria Lorenza Muiesan, Konstantinos Tsioufis, Enrico Agabiti-Rosei, Engi Abd Elhady Algharably, Michel Azizi, Athanase Benetos, Claudio Borghi, Jana Br
Journal of Hypertension.2023; 41(12): 1874. CrossRef
Adulthood Psychosocial Disadvantages and Risk of Hypertension in U.S. Workers: Effect Modification by Adverse Childhood Experiences
Timothy A. Matthews, Yifang Zhu, Wendie Robbins, Mary Rezk-Hanna, Paul M. Macey, Yeonsu Song, Jian Li
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COVID-19: Special Article

Smoking, drinking, and physical activity among Korean adults before and during the COVID-19 pandemic: a special report of the 2020 Korea National Health and Nutrition Examination Survey: Sunhye Choi, Jinwook Bahk, Suyeon Park, Kyungwon Oh, Kyunghee Jung-Choi; Epidemiol Health. 2022;44:e2022043. Published online April 25, 2022; DOI: https://doi.org/10.4178/epih.e2022043

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
This study aimed to describe trends in health behaviours between 2011 and 2020 and compare the changes in these behaviours between the 2020 COVID-19 pandemic and previous periods according to socio-demographic variables.

METHODS

This study used data from the 2011 to 2020 Korea National Health and Nutrition Examination Survey. Current cigarette smoking, high-risk drinking, and inadequate physical activity levels were used as health behaviour indicators. The age-standardized prevalence, differences in prevalence between the periods, and the annual percentage change (APC) were calculated.

RESULTS

Current cigarette smoking showed a decreasing trend (APC, -2.6), high-risk drinking remained unchanged, and inadequate physical activity levels increased (APC, 3.5) during 2011-2020. There were significant differences in high-risk drinking (3.1%p; 95% confidence interval [CI], 0.3 to 5.9) and inadequate physical activity levels (4.3%p; 95% CI, 0.4 to 8.1) between 2019 and 2020 in men. Among men, increased high-risk drinking was found in those aged 40-49 years, non-single households, urban residents, and the middle and highest income groups between 2019 and 2020. The low educational group and manual workers among men aged 30-59 years also showed an increased proportion of high-risk drinking. Inadequate physical activity levels also increased among men between 2019 and 2020 in those aged 30-39 years, non-single households, urban residents, and the upper-middle-income group.

CONCLUSIONS

In the first year of the COVID-19 pandemic, Korean men’s high-risk drinking and inadequate physical activity levels increased. In addition to social efforts to reduce the spread of infectious diseases, active measures to positively change health behaviour are needed.

Summary

Korean summary
코로나 대유행 첫 해인 2020년, 한국 남성에서 고위험음주와 부적절한 신체 활동 수준이 증가하였다. 감염성 질환 대유행 시기, 확산을 차단하기 위한 사회적 노력과 더불어 건강행태에 부정적인 여파가 미치지 않도록 적극적인 대책이 필요함을 시사한다.

Key Message
In the first year of the COVID-19 pandemic, Korean men’s high-risk drinking and inadequate physical activity levels increased. Despite Korea's positive performance in various indicators during the COVID-19 pandemic, the socioeconomic and cultural effects of COVID-19 have affected people's health behaviour. In addition to social efforts to reduce the spread of infectious diseases, active measures to positively change health behaviour are needed.

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Scientific Reports.2025;[Epub] CrossRef
Health behavior and mental health by gender in Korean adults before, during, and after the COVID-19 pandemic
Jae Yeon Jeong, Yoo Mi Jeong, Petri Böckerman
PLOS One.2025; 20(6): e0325895. CrossRef
Changes in Lifestyle Behaviors and Cardiovascular Disease Risk Factors Before and After the COVID-19 Pandemic: A Nationally Representative Study from Korea
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Factors Influencing Mental Health among Korean Adolescents: A Public Health Nursing Approach Using Data from the 7th and 8th Korea National Health and Nutrition Examination Surveys (2017–2022)
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Hye Young Shin, Ka Young Kim, Purum Kang
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Dose-response risks of all-cause, cancer, and cardiovascular disease mortality according to sex-specific cigarette smoking pack-year quantiles
Jieun Hwang, Suyoung Jo, Heewon Kang, Eunsil Cheon, Sung-il Cho
Tobacco Induced Diseases.2024; 22(July): 1. CrossRef
A national cross-sectional study on breakfast skipping-related factors and comparison of nutritional status according to breakfast skipping in older adults based on the 8th Korea National Health and Nutrition Examination Survey (KNHANES, 2020)
Anna Han, Yean Jung Choi
The Journal of nutrition, health and aging.2024; 28(9): 100335. CrossRef
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Geriatric Nursing.2024; 59: 392. CrossRef
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Min-Hee Han, Bok-Mi Jung
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Jayati Khattar, Urun Erbas Oz, Vanessa De Rubeis, Margaret de Groh, Ying Jiang, Lauren Griffith, Laura N Anderson
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Original Articles

Accelerometer-measured stepping cadence patterns in Korean adults: an analysis of data from the 2014-2015 Korea National Health and Nutrition Examination Survey: Geon Hui Kim, Hoyong Sung, Yeun Ryu, Jungjun Lim, Joon-Sik Kim, Hak Kyun Kim, Yeon Soo Kim; Epidemiol Health. 2021;43:e2021056. Published online August 17, 2021; DOI: https://doi.org/10.4178/epih.e2021056

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Abstract Summary PDF

Abstract

OBJECTIVES
The aim of this study was to identify the stepping cadence patterns in Korean adults by using objectively measured accelerometer data to analyze the time spent in each cadence category by sex and age.

METHODS

During the 2014-2015 Korean National Health and Nutrition Examination Survey, 1,703 males and females aged 19-64 years provided at least 1 valid day of data (wearing an accelerometer ≥ 10 hr/d). The mean cumulative time and percentage per day in 8 cadence categories (0, 1-19, 20-29, 30-59, 60-79, 80-99, 100-119, and ≥ 120 steps/min) by sex and age group were calculated.

RESULTS

Cumulative time and percentage per day decreased across the incremental cadence categories. Participants spent 360.08± 2.56 min/d in the non-movement cadence category and 361.50± 2.28 min/d in the incidental movement cadence category. However, they spent only about 18.1 min/d (2.1%) at ≥ 100 steps/min. Males spent significantly more time in the cadence categories of sporadic movement, purposeful steps, slow walking, and medium walking, but the other categories, except for brisk walking, had higher values in females (p< 0.001). The older age group spent less time in non-movement cadence categories, and the youngest and oldest groups spent more time at a higher cadence (≥ 100 steps/min) than the other age groups. Similar patterns were found in a subgroup analysis by sex.

CONCLUSIONS

Korean adults spent most of their time at a low cadence and only a few minutes at a high cadence (≥100 steps/min); this trend was consistent across sex and age groups.

Summary

Korean summary
본 연구에서는 2014-2015년도 국민건강영양조사자료의 가속도계 자료를 활용하여 한국 성인의 성별, 연령별 케이던스 패턴을 확인하였다. 한국 성인은 하루 평균 약 12시간(약 87%)을 분당 20보 이하의 낮은 케이던스에서 보냈고, 분당 100보 이상의 높은 케이던스에서는 하루 중 단지 약 18분 (약 2%)의 시간을 보냈다. 성별 및 연령대에 따라 약간의 차이는 있으나, 대부분 유사한 양상을 보였다.

Key Message
Korean adults spent approximately 12 hours per day (about 87%) at a low cadence (<20 steps per minute) while spending only about 18 minutes per day (about 2%) at a high cadence (≥ 100 steps per minute). Even though certain amount of differences between sex and age groups do exist, most have shown similar patterns.

Citations

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Conceptual and Evidence Update on Incidental Physical Activity: A Scoping Review of Experimental and Observational Studies
Daniel Reyes‐Molina, Rafael Zapata‐Lamana, Gabriela Nazar, Igor Cigarroa, Jonatan R. Ruiz, Eva Parrado, Josep‐Maria Losilla, Carlos Celis‐Morales
Scandinavian Journal of Medicine & Science in Sports.2025;[Epub] CrossRef
Normative percentile curves of accelerometer-measured daily step counts in Korean older adults
Seung-Hee Lee, Mihyun Lee, Yonghee Lee, Saejong Park
Physical Activity and Nutrition.2025; 29(3): 46. CrossRef

Associations of physical activity at work and household income with obesity: a cross-sectional study among rural adults in Korea: Su Yeon Kye, Heeyoun Cho, Tran Thi Phuong Thao, Jin-Kyoung Oh, Min Kyung Lim; Epidemiol Health. 2021;43:e2021003. Published online December 29, 2020; DOI: https://doi.org/10.4178/epih.e2021003

22,646 View
428 Download
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6 Crossref

Abstract Summary PDF

Abstract

OBJECTIVES
This study was performed to identify the effect of physical activity at work on obesity and to analyze the contribution of socioeconomic factors and health behaviors to this association, which has been relatively little studied.

METHODS

From the Korean National Cancer Center Community Cohort, a total of 5,587 adults (2,125 men; 3,462 women) aged more than 30 years living in rural areas were enrolled. Information on socio-demographic factors, health behaviors, and body mass index was gathered using face-to-face interviews and measurements of height and weight.

RESULTS

Inverse associations were identified between vigorous-intensity physical activity at work and obesity in both men and women, while no association was found between vigorous-intensity physical activity during leisure time and obesity. High household income was independently associated with a lower risk of obesity among those who had low levels of vigorous-intensity physical activity at work. Vigorous physical activity at work showed an inverse association with obesity in rural areas where heavy manual labor is common.

CONCLUSIONS

Our findings indicate the necessity to account for various types of physical activity to improve the assessment and prevention of obesity.

Summary

Korean summary
신체활동의 종류에 따라 비만에 미치는 영향의 차이가 있는지를 보기 위하여 육체 노동이 많은 농촌지역 성인을 대상으로 직무신체활동과 비만과의 관련성을 다른 잠재요인을 보정하여 분석하였다. 남녀 모두에서 고강도 직무신체활동과 비만과의 역연관성이 확인된 반면 여가신체활동과 비만과의 연관성은 확인되지 않았다. 가구소득이 높은 경우 직무신체활동의 강도가 낮은 경우에도 비만과 역연관성을 보였다. 향후 비만 예방 및 중재 전략 수립 시 대상집단의 특성을 고려하여 다양한 종류의 신체활동에 대한 평가가 고려되어야 할 것이다.

Key Message
Regarding the inverse association of physical activity at work and household income with obesity identified in the study, various type of physical activity including physical activity at work and characteristics of target population might be concerned for assessment and prevention of obesity.

Citations

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Association between domain-specific physical activity and triglyceride‑glucose (TyG) index among US adults: Evidence from NHANES 2007–2018
Kai Yao
BMC Public Health.2025;[Epub] CrossRef
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Yingying Wang, Xinbi Zhang, Changhao Jiang
BMC Public Health.2025;[Epub] CrossRef
The association between different types of physical activity and smoking behavior
Jipeng Zhang, Yiwen Cao, Hongfei Mo, Rui Feng
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Yudi Alexandra González, Diana Lucia Vega-Díaz
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Comparison between walking and moderate-to-vigorous physical activity: associations with metabolic syndrome components in Korean older adults: Ki-Yong An; Epidemiol Health. 2020;42:e2020066. Published online October 28, 2020; DOI: https://doi.org/10.4178/epih.e2020066

20,571 View
160 Download
10 Web of Science
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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
The purpose of this study was to compare moderate-to-vigorous physical activity (MVPA) with walking in terms of associations with metabolic syndrome components in Korean older adults.

METHODS

Data on 1,388 older adults (age ≥65 years) from the Korea National Health and Nutrition Examination Survey 2018 were analyzed in this study. MVPA time and walking time per week were used as physical activity variables and blood pressure, waist circumference, glucose, high-density lipoprotein cholesterol, and triglyceride levels were analyzed as metabolic syndrome components. Partial correlations, analysis of covariance, and multinomial logistic regression were used for statistical analysis after adjusting for age, sex, smoking, and alcohol consumption.

RESULTS

High-density lipoprotein cholesterol levels were significantly higher in the low MVPA/high walking and high MVPA/ high walking groups than in the low MVPA/low walking group. Triglyceride levels were significantly lower in the high MVPA/ high walking group than in the low MVPA/low walking and low MVPA/high walking groups. Engaging in <150 min/wk of MVPA increased the likelihood of abnormal blood pressure and metabolic syndrome by 1.81 times and 1.89 times, respectively, compared to ≥150 min/wk of MVPA. Engaging in <180 min/wk of walking raised the likelihood of having abnormal highdensity lipoprotein levels by 1.32 times compared to ≥180 min/wk of walking.

CONCLUSIONS

Not only MVPA but also walking was significantly associated with metabolic syndrome components in Korean older adults. Considering older adults’ preferences and exercise barriers, walking should be considered as an essential component of physical activity guidelines to prevent chronic diseases in older adults.

Summary

Korean summary
현재까지 저강도 신체활동 (걷기)은 중고강도 신체활동에 비해 상대적으로 그 중요성이 간과되어 왔다. 하지만 본 연구는 저강도 신체활동도 중고강도 신체활동 못지 않게 노인들에게서 대사증후군을 예방할 수 있는 중요한 역할을 할 수 있음을 보여준다. 게다가 노인들의 신체적 제약, 부상의 위험, 운동 선호도 등을 감안하면 걷기와 같은 저강도 신체활동은 노인들의 건강유지를 위한 신체활동 권고사항의 필수요소로 고려되어야 함을 제안한다.

Citations

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Review

A systematic review of barriers and motivators to physical activity in elderly adults in Iran and worldwide: Soudabeh Yarmohammadi, Hossein Mozafar Saadati, Mohtasham Ghaffari, Ali Ramezankhani; Epidemiol Health. 2019;41:e2019049. Published online November 29, 2019; DOI: https://doi.org/10.4178/epih.e2019049

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Abstract PDF Supplementary Material

Abstract

OBJECTIVES
This study was conducted to identify and characterize the barriers and motivations to physical activity (PA) for elderly adults in Iran and other countries.

METHODS

We searched 6 databases (PubMed, Embase, Scopus, Web of Science, Magiran, and the Scientific Information Database) from 2000 to the November 2017, using “aged 60 and over,” “physical activity” or “exercise,” and “motivator” and “barrier” as keywords. Two reviewers independently performed the search, screening, and quality assessment of the studies.

RESULTS

In total, 34 papers were finally included in the study. The most important barriers, based on the frequency of factors, included physical problems, having no companions, and physical barriers to walking. The motivators included improving one’s physical condition, being social, and suitability of the physical environment.

CONCLUSIONS

Important motivators and barriers to PA were more closely related to intrapersonal factors than to the interpersonal and environmental domains. The barriers and motivators to PA in the elderly were not markedly different between Iran and other countries. Therefore, a general strategy could be designed to improve PA in the elderly.

Summary

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Original Articles

Physical activity level in Korean adults: the Korea National Health and Nutrition Examination Survey 2017: Ki-Yong An; Epidemiol Health. 2019;41:e2019047. Published online November 9, 2019; DOI: https://doi.org/10.4178/epih.e2019047

47,821 View
272 Download
25 Web of Science
26 Crossref

Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
This study investigated physical activity (PA) participation based on demographic, physical, and psychological variables in Korean adults.

METHODS

Participants were divided into four groups (combined, aerobic only, resistance only, and neither) based on meeting the PA guidelines using moderate and vigorous PA time and resistance exercise frequency from the Korea National Health and Nutrition Examination Survey 2017. The association between meeting the PA guidelines and demographic, medical, fitness, lifestyle, and psychological variables were analyzed using complex samples crosstabs and a general linear model.

RESULTS

Of the 5,820 Korean adults, 66.0% did not meet any of the guidelines. Among demographic factors, sex, age, marital status, income, education level, occupation, and employment status were associated with meeting the PA guidelines. Chronic disease prevalence, weight, waist circumference, body mass index, diastolic blood pressure, glucose, high-density lipoprotein and triglyceride levels, hand-grip strength, resting heart rate, and family history of chronic disease in the medical and fitness variables; frequency of drinking and eating breakfast, total calorie, water, protein, and fat intake in the lifestyle variables; and perceived stress, depression, suicidal thoughts, and quality of life in the psychological variables were associated with meeting PA guidelines.

CONCLUSIONS

Most Korean adults participate in insufficient PA. Moreover, individuals who are socially underprivileged, have low-income or poor physical and mental health conditions participated in relatively less PA. Our findings suggest that government and individual efforts are required to increase PA and resolve health inequality in Korean adults.

Summary

Korean summary
2017년 국민건강영양조사 자료를 분석한 결과, 한국 성인들의 신체활동 실천율은 매우 낮았으며, 특히, 사회적 약자나 저소득층, 신체적, 정신적 건강 위험요인이 높은 사람들에게 더 낮게 나타났다. 신체활동은 건강증진을 위한 가장 경제적이며 효율적인 방법으로써, 신체활동 참여를 늘리고 건강불평등을 해소하기 위한 정부, 의료기관, 교육기관은 물론 국민 개개인의 신체활동에 대한 인식개선과 적극적인 노력이 필요하다.

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Decomposing Gender Disparity in Total Physical Activity among Iranian Adults: Ebrahim Rahimi, Seyed Saeed Hashemi-Nazari, Koorosh Etemad, Hamid Soori; Epidemiol Health. 2017;39:e2017044. Published online October 16, 2017; DOI: https://doi.org/10.4178/epih.e2017044

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Abstract PDF

Abstract

OBJECTIVES
While gender differences in physical activity (PA) have been reported, their origin is not well understood. The present study aimed to identify factors contributing to this disparity.

METHODS

This was a population-based cross-sectional study based on the 2011 surveillance of risk factors of non-communicable diseases that was conducted among Iranian adults. Multi-staged sampling was performed to obtain the required study sample. The primary outcome was gender differences in the prevalence of sufficient physical activity (SPA). Total physical activity (TPA) was calculated as metabolic equivalents (MET) per minute during a typical week, as recommended by the World Health Organization. On this basis, achieving 600 MET-min/wk or more was defined as SPA. The nonlinear Blinder-Oaxaca decomposition technique was used to explain the disparity.

RESULTS

The predicted gap was 19.50%. About one-third of the gap was due to differences in the level of observable covariates. Among them, work status contributed the most (29.61%). A substantial portion of the gap remained unexplained by such differences, of which about 40.41% was related to unobservable variables. The differential effects of standard of living, ethnicity, and smoking status made the largest contribution, accounting for 37.36, 35.47, and 28.50%, respectively.

CONCLUSIONS

Interventions to reduce the gender gap in PA should focus on increasing TPA among housewives and women with chronic diseases, as well as those with a higher standard of living. In addition, it is essential to explore the impact of ethnicity and smoking status on women’s TPA in order to promote health.

Summary

Citations

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Evaluating socioeconomic inequalities in self-rated oral health and its contributing factors in Brazilian older adults
Fabíola Bof de Andrade, José Leopoldo Ferreira Antunes, Mirza Rustum Baig
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Gender differences in cardiac rehabilitation participation and outcomes: an 18-year retrospective study in Iran
Marzieh Najafi, Zahra Teimouri-Jervekani, Marjan Jamalian, Hamidreza Roohafza, Mohammad Hossein Paknahad, Mohammad mahdi Hadavi, Neda Dorostkar, Masoumeh Sadeghi
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The association between physical activity and atrial fibrillation applying the Heaviside function in survival analysis: the Multi-Ethnic Study of Atherosclerosis: Yaser Mokhayeri, Seyed Saeed Hashemi-Nazari, Mohammad Ali Mansournia, Hamid Soori, Soheila Khodakarim; Epidemiol Health. 2017;39:e2017024. Published online June 18, 2017; DOI: https://doi.org/10.4178/epih.e2017024

23,219 View
205 Download
6 Web of Science
5 Crossref

Abstract PDF

Abstract

OBJECTIVES
Although the effect of physical activity (PA) on the incidence of atrial fibrillation (AF) has been studied, contradictory results have been reported. Such discrepancies may reflect the different effects of various types of PA upon AF, as well as gender interactions. Therefore, we aimed to evaluate the associations of PA types (total, moderate/vigorous, and intentional), as well as walking pace, with AF risk in men and women.

METHODS

Using the Multi-Ethnic Study of Atherosclerosis Typical Week Physical Activity Survey, 3 PA measures and walking pace were calculated among 6,487 men and women aged 45-84 years. The incidence of AF over approximately 11 years of followup was ascertained. The association of each PA measure and walking pace with AF incidence was estimated using multivariable Cox proportional hazard models. An extended Cox model with Heaviside functions (hv) of time was used to estimate the effects of time-varying covariates.

RESULTS

During 11 years of follow-up (49,557 person-years), 242 new AF cases occurred. The incidence rate of AF was 48.83 per 10,000 person-years. The proportional hazard (PH) assumption for total PA among women was not met; hence, we used the hv to calculate the hazard ratio. Total PA in women in the hv2 analysis was negatively associated with AF in all 3 models, although for hv1 no significant association was observed. The PH assumption for walking pace among men was not met, and none of the hv showed a statistically significant association between walking pace and AF in men.

CONCLUSIONS

These results suggest that PA is inversely associated with AF in women.

Summary

Citations

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Leisure-time and occupational physical activity and risk of cardiovascular disease incidence: a systematic-review and dose-response meta-analysis of prospective cohort studies
Asma Kazemi, Sepideh Soltani, Dagfinn Aune, Elham Hosseini, Zeinab Mokhtari, Zahra Hassanzadeh, Ahmad Jayedi, Francisco Pitanga, Masoumeh Akhlaghi
International Journal of Behavioral Nutrition and Physical Activity.2024;[Epub] CrossRef
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Weekly physical activity and incident atrial fibrillation in females – A dose-response meta-analysis
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International Journal of Cardiology.2023; 370: 191. CrossRef
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Epidemic modeling and Table-top Exercise for Emerging Infectious Diseases in Korea.: Byung Chul Chun; Korean J Epidemiol. 2006;28(1):47-63.

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Abstract PDF: Abstract
Understanding the spread of infections is of vital importance in the control of epidemics and the development of proper policies toprevent infectious diseases. Theory and techniques have been developed for the study of both the evolution of diseases with individual people and the transmission of infections through populations. From broad theoretical issues to specific practical problems, the mathematical modeling studies of infectious diseases have provided great insight to solve the mechanisms of disease spread and to predict the course of epidemics. Emerging and reemerging infectious diseases have attracted widespread concern in Korea. While preparing the influenza pandemic plan in 2004, we developed a model of the new influenza pandemic to estimate the number of cases and deaths, the shortage of medical resources, and the effect of interventions such as isolation and vaccination. Based on this model, we constructed a possible pandemic scenario of the emerging virus, and designed a table-top exercise for public health officials and related administration staff. On March 30th, 2005, the exercise was performed and the results were evaluated as successful. In the case of bioterrorism, a model of small pox epidemic was developed in 2005 to examine the speed of the disease spread in the population and to evaluate the intervention effects in a Korean city. The simulation results were also helpful to form a guideline to prepare for a small pox epidemic. These two experiments confirmed the usefulness of epidemic modeling in Korea.; Summary

The Factors Associated with the Abnormal Eating Behavior in University Hospital's Nurses.: Young Geon Ji, Su Jin Kim, Hyung Gon Kang; Korean J Epidemiol. 2005;27(1):108-117.

65,535 View
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Abstract PDF: Abstract
OBJECTIVES
To compare eating behavior according to the shift work and to find the factors associated with the abnormal eating behavior in university hospital's nurses.
METHODS
For this assessment, a cross-sectional study was conducted with 300 university hospital's nurses. Nurses were questioned with self-reported questionnaire forms. After excluding cases with incomplete data, 276 cases are enrolled in the study. To find the factors associated with the abnormal eating behavior, we conducted multiple logistic regression analysis.
RESULTS
The proportions of shift work nurses were 63.77%(176 cases). The proportions of abnormal eating behavior among shift work nurses were 22.73%(40 cases), but only 6.00%(6 cases) among non-shift work nurses had the abnormal eating behavior. Considering the shift work period, the proportions of abnormal eating behavior were 31.25%, 22.92% and 17.50% in case of shift work period were less than 1 year, 1~3 years and more than 3 years, respectively. The abnormal eating behavior was associated with having shift work, doing exercise, more weekly working hours, being on a diet and having perception of overweight. But age and body mass index were not influenced the abnormal eating behavior.
CONCLUSIONS
In this study, we found that the factors associated with the abnormal eating behavior are the shift work, exercise, weekly working hours, perception of overweight and diet.; Summary

The Cross-sectional Study on the Relationship of Health Behavior and Immune Function.: Soon Young Lee, Yeon Sook Yun, Ki Whan Kim, Seon Woo Kim, Ju Won Park; Korean J Epidemiol. 1998;20(2):212-218.

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11 Download

Abstract PDF: Abstract
To investigate the association of individual health behaviors with imune response against tumor or viral infection, peripheral blood lymphocytes of 185 healthy males in aged from 35 to 44 years for natural killer(NK) cell activity, frequencies of lymphocytes subsets and proliferation response of T and B cell. NK cell activity was determined by Cr release activity assay and lymphocytes subsets were counted using surface antigens(CD4, CD8, CD56) by flow cytometry. The responsiveness of T and B were measured as proliferation stimulated by mitogens. Subjects were classified into four distinct lifestyle patterns, health promotive lifestyle, passive lifestyle, fitness lifestyle and hedonic lifestyle from information on their health behaviors(cigarette smoking, alcohol consumption, and physical activity). Health promotive lifestyle had the highest NK cell activity(Lu30/10(6)CD56) which was significantly higher than hedonic lifestyle)p<0.05). The responsiveness of T cell was significantly lower in passive lifestyle and hedonic lifestyles compared to health promotive lifestyle and fitness lifestyles(p<0.05). However, there was no significant difference in the responsiveness of B cell, CD4, and CD8 among four lifestyles. This cross-sectional study showed the NK cell activity in individuals with desirable health behaviors was lower. The variation of immunity among individuals was not considered in this study, hence the intervention study reflection individual variations is recommended.; Summary

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