Associations between physical activity and BMI, body fatness, and visceral adiposity in overweight or obese Latino and non-Latino adults.
Associations between physical activity and BMI, body fatness, and visceral adiposity in overweight or obese Latino and non-Latino adults.
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DOI：
10.1038/ijo.2017.49
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发表时间：
2017-06
期刊：
影响因子：
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通讯作者：
Patrick K
中科院分区：
文献类型：
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作者：
Cameron N;Godino J;Nichols JF;Wing D;Hill L;Patrick K
尽管几项研究已经报道了中等到高强度体力活动（MVPA）、身体肥胖程度和内脏脂肪组织（VAT）之间的关联，但这些关联在拉丁裔和非拉丁裔之间的差异程度仍不清楚。本研究评估了拉丁裔和非拉丁裔成年人身体成分与MVPA之间的关联。
利用从298名超重成年人中收集的基线数据进行了一项探索性横断面分析，这些成年人参与了一项为期12个月的随机对照试验，该试验测试了短信对改善减肥效果的功效。MVPA、身体肥胖程度和VAT分别通过佩戴在腰部的加速度计、双能X线吸收法（DXA）以及基于DXA的软件（GE CoreScan，通用电气公司，威斯康星州麦迪逊市）进行评估。加速度计数据少于5天或缺少DXA数据的参与者被排除在外；236名参与者拥有完整数据。多变量线性回归评估了身体成分与每日MVPA之间的关联，MVPA定义为MVPA时间、MVPA次数（每次持续时间≥10分钟）、非MVPA次数（每次持续时间<10分钟）以及是否达到150分钟的MVPA标准。种族的调节作用通过一个乘法交互项进行建模。
在预测身体脂肪百分比时，种族和MVPA之间的交互作用显著（p = 0.01，95%置信区间[0.58, 4.43]），即与拉丁裔相比，非拉丁裔中MVPA的给定增加与总体身体脂肪的更大下降相关（根据年龄、性别和加速度计佩戴时间进行调整）。在预测VAT（克）（p = 0.78，95%置信区间[−205.74, 273.17]）和体重指数（BMI）（p = 0.18，95%置信区间[−0.49, 2.26]）时，种族和MVPA之间没有交互作用。
与拉丁裔相比，非拉丁裔中MVPA的增加与身体脂肪的更大下降相关，但与BMI和VAT无关。这表明，与总体身体肥胖程度相比，MVPA引起的VAT和BMI变化可能受种族的影响较小。
Although several studies have reported associations between moderate to vigorous physical activity (MVPA), body fatness, and visceral adipose tissue (VAT), the extent to which associations differ among Latinos and non-Latinos remains unclear. The present study evaluated the associations between body composition and MVPA in Latino and non-Latino adults. An exploratory, cross-sectional analysis was conducted using baseline data collected from 298 overweight adults enrolled in a 12-month randomized controlled trial that tested the efficacy of text messaging to improve weight loss. MVPA, body fatness and VAT were assessed by waist-worn accelerometry, DXA, and DXA-derived software (GE CoreScan GE, Madison, WI) respectively. Participants with less than 5 days of accelerometry data or missing DXA data were excluded; 236 participants had complete data. Multivariable linear regression assessed associations between body composition and MVPA per day, defined as time in MVPA, bouts of MVPA (time per bout ≥10 min), non-bouts of MVPA (time per bout <10 min), and meeting the 150-minute MVPA guideline. The modifying influence of ethnicity was modeled with a multiplicative interaction term. The interaction between ethnicity and MVPA in predicting percent body fat was significant (p = 0.01, 95% CI [0.58, 4.43]) such that a given increase in MVPA was associated with a greater decline in total body fat in non-Latinos compared to Latinos (adjusted for age, sex and accelerometer wear time). There was no interaction between ethnicity and MVPA in predicting VAT (g) (p = 0.78, 95% CI [−205.74, 273.17]) and BMI (p = 0.18, 95% CI [−0.49, 2.26]). An increase in MVPA was associated with a larger decrease in body fat, but neither BMI nor VAT, in non-Latinos compared to Latinos. This suggests that changes in VAT and BMI in response to MVPA may be less influenced by ethnicity than is total body fatness.