* Behavioural and Metabolic Research Unit, School of Human Kinetics, Faculty of Health Sciences, University of Ottawa , Ottawa, Ontario.
Climacteric. 2014 Feb;17(1):79-86. doi: 10.3109/13697137.2013.810715. Epub 2013 Aug 2.
To investigate the relationship between time spent performing physical activity (PA) and adiposity across the menopausal transition.
Body weight and body composition were analyzed in 65 women (47-54 years old; body mass index 23.2 ± 2.4 kg/m(2)) in a 5-year prospective study. Time spent in PA of varying intensities (sedentary, light, moderate and vigorous) was determined from 7-day accelerometer measurement and energy intake with a 7-day food diary.
Significant negative correlations were observed between the time spent in light-intensity PA and fat mass (FM) (r = -0.38, p < 0.005), central FM (r = -0.36, p < 0.005), peripheral FM (r = -0.33, p < 0.01), and percent body fat (r = -0.42, p < 0.001) at year 1, respectively. No significant correlations were noted between measures of adiposity and time spent performing either moderate or vigorous PA. Analyses using tertiles of time spent in light PA at year 1 showed that FM (20.7 ± 4.0 vs. 20.3 ± 6.6 vs. 16.6 ± 4.6 kg, p < 0.05), central FM (10.1 ± 2.6 vs. 10.0 ± 3.8 vs. 7.8 ± 2.4 kg; p < 0.05) and percent body fat (34.5 ± 5.1 vs. 32.2 ± 7.7 vs. 28.1 ± 6.2%, p < 0.01) were all significantly lower in women in the highest tertile. These differences remained significant after covariate analyses using time spent in moderate- and high-intensity PA and total energy intake. Finally, lower levels of FM, percent body fat, central and peripheral FM persisted in women who spent more time in light PA (highest tertiles) over the 5-year follow-up.
Our results suggest that the time spent performing light PA may have a greater impact on adiposity than moderate and/or vigorous PA, an observation independent of the menopausal status.
研究绝经过渡期间进行身体活动（PA）的时间与肥胖之间的关系。
对 65 名女性（47-54 岁；体重指数 23.2 ± 2.4 kg/m²）进行了 5 年的前瞻性研究，分析了体重和身体成分。通过 7 天加速计测量和 7 天食物日记中的能量摄入来确定不同强度（久坐、轻、中、剧烈）的 PA 时间。
在第 1 年，轻强度 PA 时间与脂肪量（FM）（r = -0.38，p < 0.005）、中心 FM（r = -0.36，p < 0.005）、外周 FM（r = -0.33，p < 0.01）和体脂百分比（r = -0.42，p < 0.001）呈显著负相关。进行中度或剧烈 PA 时，身体肥胖的测量值与时间之间没有显著相关性。使用第 1 年轻 PA 时间的三分位数分析表明，FM（20.7 ± 4.0 与 20.3 ± 6.6 与 16.6 ± 4.6 kg，p < 0.05）、中心 FM（10.1 ± 2.6 与 10.0 ± 3.8 与 7.8 ± 2.4 kg；p < 0.05）和体脂百分比（34.5 ± 5.1 与 32.2 ± 7.7 与 28.1 ± 6.2%，p < 0.01）在最高三分位组的女性中均显著降低。在调整了中高强度 PA 和总能量摄入时间的协变量分析后，这些差异仍然显著。最后，在 5 年的随访中，进行更多轻 PA（最高三分位）的女性，其 FM、体脂百分比、中心和外周 FM 水平仍较低。
我们的结果表明，与中高强度 PA 相比，轻 PA 时间的长短可能对肥胖的影响更大，这种观察结果与绝经状态无关。
