Thirteen-Year Associations of Occupational and Leisure-Time Physical Activity with Cardiorespiratory Fitness in CARDIA.

Autor:	Quinn TD; Department of Epidemiology and Biostatistics, West Virginia University School of Public Health, Morgantown, WV., Lane A; Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC., Pettee Gabriel K; Department of Epidemiology, The University of Alabama at Birmingham, Birmingham, AL., Sternfeld B; Division of Research, Kaiser Permanente Northern California, Oakland, CA., Jacobs DR Jr; Mayo Professor of Public Health, Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN., Smith P, Barone Gibbs B; Department of Epidemiology and Biostatistics, West Virginia University School of Public Health, Morgantown, WV.
Jazyk:	angličtina
Zdroj:	Medicine and science in sports and exercise [Med Sci Sports Exerc] 2023 Nov 01; Vol. 55 (11), pp. 2025-2034. Date of Electronic Publication: 2023 Jun 18.
DOI:	10.1249/MSS.0000000000003237
Abstrakt:	Purpose: Differential effects on fitness are hypothesized to contribute to the opposing health effects of leisure-time physical activity (LTPA) and occupational physical activity (OPA). As such, this study examined cross-sectional and longitudinal associations of fitness with LTPA and OPA. Methods: This study examined fitness associations with LTPA and OPA across 13 yr in the Coronary Artery Risk Development in Young Adults study (years 7 (baseline), 10, 15, and 20 (follow-up) examinations). Fitness was measured at baseline and follow-up via symptom-limited maximal graded exercise test (GXT) duration (in seconds), whereas LTPA and OPA were self-reported during each examination. Baseline and follow-up cross-sectional associations of LTPA (low, medium, high) and OPA (0, 1-6, and ≥6 months with OPA) with fitness were examined using linear regression. Longitudinal linear regression examined associations between 13-yr LTPA (low, medium, or high) and OPA (no, decreasing, or increasing) trajectories with fitness at follow-up, adjusted for baseline values. All models adjusted for center, sex, race, age, education, smoking history, alcohol intake, resting blood pressure, diabetes status, and body mass index. Stratified analyses examined associations by sex (female/male), race (Black/White), and LTPA groups. Results: Compared with low, medium, and high LTPA were positively associated with fitness in all analyses ( P < 0.001). Reporting 1-6 or ≥6 months with OPA was negatively associated with fitness in cross-sectional follow-up models ( β = -15.6 and -15.4, respectively; P ≤ 0.01). Longitudinally, those with increasing OPA had lower follow-up fitness compared with no OPA ( β = -16.41, P < 0.01). Negative associations of OPA with fitness were not meaningfully different across sex and race groups. Significant LTPA-OPA interactions were observed ( P < 001). Conclusions: Physical activity research and public health promotion should consider domain-specific associations on cardiovascular health. (Copyright © 2023 by the American College of Sports Medicine.)
Databáze:	MEDLINE
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