The Relationship Between Time of Day of Physical Activity and Obesity in Older Women
The Relationship Between Time of Day of Physical Activity and Obesity in Older Women
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DOI：
10.1123/jpah.2015-0152
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发表时间：
2016-04-01
影响因子：
3.1
通讯作者：
Lee, I-Min
中科院分区：
文献类型：
--
作者：
Chomistek, Andrea K.;Shiroma, Eric J.;Lee, I-Min
背景：身体活动对于保持健康的体重很重要。一天中进行锻炼的时间是行为的一个高度自由裁量的方面，可能会影响体重控制，但证据有限。因此，我们研究了女性身体活动时间与肥胖风险之间的关系。研究方法：对7157名女性健康研究参与者进行了横断面分析，这些参与者参加了2011年开始的辅助研究，该研究使用加速度计测量身体活动。暴露量为中午12：00之前累积的总加速度计计数的百分比，结果为肥胖。结果：参与者的平均（+/- SD）BMI为26.1（+/- 4.9）kg/m2，1322名女性肥胖。每天的平均活动计数为203，870（95，811），其中平均47.1%（+/- 11.5%）在早晨记录。在多变量调整模型中，在中午12：00之前记录到加速度计计数< 39%（最低四分位数）的女性肥胖的几率比那些在中午之前记录到>= 54%（最高四分位数）的女性高26%（P趋势= 0.02）。结论：这些研究发现-早晨活动较少的女性可能有更高的肥胖风险-如果得到证实，可以提供一种新的策略来帮助对抗肥胖这一重要的健康问题。
Background: Physical activity is important for maintaining healthy weight. The time of day when exercise is performed a highly discretionary aspect of behavior may impact weight control, but evidence is limited. Thus, we examined the association between the timing of physical activity and obesity risk in women. Methods: A cross-sectional analysis was conducted among 7157 Women's Health Study participants who participated in an ancillary study begun in 2011 that is measuring physical activity using accelerometers. The exposure was percentage of total accelerometer counts accumulated before 12:00 noon and the outcome was obesity. Results: Mean (+/- SD) BMI among participants was 26.1 (+/- 4.9) kg/m(2) and 1322 women were obese. The mean activity counts per day was 203,870 (95,811) of which a mean 47.1% (+/- 11.5%) were recorded in the morning. In multivariable-adjusted models, women who recorded < 39% (lowest quartile) of accelerometer counts before 12:00 noon had a 26% higher odds of being obese, compared with those recording >= 54% (highest quartile) of counts before noon (P-trend = 0.02). Conclusions: These study findings-that women who are less active during morning hours may be at higher risk of obesity-if confirmed can provide a novel strategy to help combat the important health problem of obesity.