Seasonal variation in household, occupational, and leisure time physical activity: longitudinal analyses from the seasonal variation of blood cholesterol study
AuthorsMatthews, Charles E.
Freedson, Patty S.
Hebert, James R.
Stanek, Edward J.
Merriam, Philip A.
Rosal, Milagros C.
Ebbeling, Cara B.
Ockene, Ira S.
UMass Chan AffiliationsDepartment of Medicine, Division of Cardiovascular Medicine
Department of Medicine, Division of Preventive and Behavioral Medicine
Document TypeJournal Article
Analysis of Variance
Body Mass Index
Seasonal Variation of Blood Cholesterol Study
Environmental Public Health
Musculoskeletal, Neural, and Ocular Physiology
MetadataShow full item record
AbstractThe authors examined seasonal variation in physical activity in longitudinal analyses of 580 healthy adults from Worcester, Massachusetts (the Seasonal Variation of Blood Cholesterol Study, 1994-1998). Three 24-hour physical activity recalls administered five times during 12 months of follow-up were used to estimate household, occupational, leisure time, and total physical activity levels in metabolic equivalent (MET)-hours/day. Trigonometric models were used to estimate the peak-to-trough amplitude and phase of the peaks in activity during the year. Total activity increased by 1.4 MET-hours/day (121 kcal/day) in men and 1.0 MET-hours/day (70 kcal/day) in women during the summer in comparison with winter. Moderate intensity nonoccupational activity increased by 2.0-2.4 MET-hours/day in the summer. During the summer, objectively measured mean physical activity increased by 51 minutes/day (95% confidence interval: 20, 82) in men and by 16 minutes/day (95% confidence interval: -12, 45) in women. The authors observed complex patterns of seasonal change that varied in amplitude and phase by type and intensity of activity and by subject characteristics (i.e., age, obesity, and exercise). These findings have important implications for clinical research studies examining the health effects of physical activity and for health promotion efforts designed to increase population levels of physical activity.
Am J Epidemiol. 2001 Jan 15;153(2):172-83.
Permanent Link to this Itemhttp://hdl.handle.net/20.500.14038/26393
Showing items related by title, author, creator and subject.
Seasonality in onset of youth smoking parallels seasonality in cigarette salesWellman, Robert J.; DiFranza, Joseph R. (2003-09-06)Extract: Cigarette sales in the USA peak in the summer months, June through August. This finding prompted examination of data on the onset of youth smoking to determine whether a similar pattern could be discerned. In this letter we report data from the Development and Assessment of Nicotine Dependence in Youth (DANDY) study.
A population-based dietary inflammatory index predicts levels of C-reactive protein in the Seasonal Variation of Blood Cholesterol Study (SEASONS)Shivappa, Nitin; Steck, Susan E.; Hurley, Thomas G.; Hussey, James R.; Ma, Yunsheng; Ockene, Ira S.; Tabung, Fred; Hebert, James R. (2014-08-01)OBJECTIVE: To perform construct validation of the population-based Dietary Inflammatory Index (DII) using dietary data from two different dietary assessments and serum high-sensitivity C-reactive protein (hs-CRP) as the construct validator. DESIGN: Using data derived from (i) three 24 h dietary recalls (24HR) at baseline and at the end of each subsequent quarter (i.e. up to fifteen over a year) and (ii) a 7 d dietary recall (7DDR) measured at baseline and then quarterly, regression analyses were conducted to test the effect of the DII score on serum hs-CRP as dichotomous (3 mg/l), while controlling for important potential confounders. SETTING: Existing data from the Seasonal Variation of Blood Cholesterol Study (SEASONS), a longitudinal observational study of healthy participants recruited in Worcester, MA, USA and participants were followed for 1 year. SUBJECTS: Participants who had at least one hs-CRP measurement over her/his 1-year participation (n 495 for 24HR, n 559 for 7DDR). RESULTS: Higher DII scores were associated with values of hs-CRP >3 mg/l (OR = 1.08; 95 % CI 1.01, 1.16, P = 0.035 for the 24HR; and OR = 1.10; 95 % CI 1.02, 1.19, P = 0.015 for the 7DDR). CONCLUSIONS: The population-based DII was associated with interval changes in hs-CRP using both the 24HR and 7DDR. The success of this first-of-a-kind attempt at relating individuals' intakes of inflammation-modulating foods using this refined DII, and the finding that there is virtually no drop-off in predictive capability using a structured questionnaire in comparison to the 24HR standard, sets the stage for use of the DII in a wide variety of other epidemiological and clinical studies.
Season 2: Welcome to Season 2!Yang, Qiuwei; Silk, Hugh; Bhatia, Divya; Sardell, Jesse; Ngangmeni, Lael (2021-11-22)Join us for Season 2 of Murmurs: Stories from our Journey in Medicine. We'll be featuring new voices from the UMass (now UMass Chan) community. First episode premieres Monday, November 22nd with new episodes weekly! The transcript for this episode is available for download as an additional file.