Regular exercise behaviour in youth is not related to current body mass index or body mass index at 7-year follow-up.

摘要: Summary Objective This population-based study aimed (1) to test the presence of an association between regular voluntary exercise behaviour (EB) that is performed in leisure time and body mass index (BMI) youth (2) investigate causal nature this using a longitudinal design genetically informative subjects. Design methods Both EB BMI were assessed repeatedly over 21 458 twin individuals from Netherlands Twin Register (47.5% male) – first by parental report (ages 7, 10 12) subsequently through self-report surveys 14, 16 18). was quantified as weekly metabolic equivalent task hours. Results Correlations higher for than (r ≈ 0.70 vs. r ≈ 0.35) across 12 different follow-up periods. Cross-sectionally, involvement not associated with lower childhood identical pairs discordant EB; exercising did have non-exercising twin. Longitudinally, linear quadratic relationships non-significant. Changes induce opposite changes BMI. Conclusions No consistent observed ages 7 18 years.