Influence of Bouts of Physical Activity on Overweight in Youth
| Autor: | Ian Janssen, Amy E. Mark |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Male
medicine.medical_specialty Adolescent National Health and Nutrition Examination Survey Epidemiology education Physical activity Motor Activity Overweight Logistic regression Body Mass Index medicine Humans Child Adiposity Monitoring Physiologic business.industry musculoskeletal neural and ocular physiology Public Health Environmental and Occupational Health Nutrition Surveys United States Large sample Quartile Normal weight Physical therapy Female medicine.symptom business human activities Body mass index |
| Zdroj: | American Journal of Preventive Medicine. 36:416-421 |
| ISSN: | 0749-3797 |
| Popis: | Background It is unknown whether bouts of physical activity confer benefits beyond the total volume of physical activity. It was hypothesize that bouts of physical activity would independently predict overweight in youth. Methods The sample included 2498 youth (aged 8–17 years) from the 2003–2004 and 2005–2006 cycles of the National Health and Nutrition Examination Survey. Analyses were conducted in 2008. Sporadic sessions (1–4 minutes) of moderate-to-vigorous physical activity (MVPA); short bouts (5–9 minutes) of MVPA; and medium-to-long bouts (≥10 minutes) of MVPA were measured over 7 days using Actigraph accelerometers. BMI was used to classify participants as normal weight or overweight. Logistic regression was used to predict the relative odds of overweight according to total MVPA and bouts of MVPA. Results After controlling for the volume of MVPA, individuals in the highest quartile for total bouts of MVPA (short + medium-to-long bouts) were only 0.38 (95% CI=0.18, 0.80) times as likely to be overweight compared to the lowest quartile. After controlling for the volume of MVPA and the amount accumulated in short bouts, individuals in the highest quartile for medium-to-long bouts of MVPA were only 0.55 (95% CI=0.32, 0.95) times as likely to be overweight compared to the lowest quartile. Conclusions Moderate-to-vigorous physical activity that took place in bouts conferred benefits on adiposity status that were independent of the total volume of MVPA in this large sample of youth. |
| Databáze: | OpenAIRE |
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