Swartz Ann M, Tarima Sergey, Miller Nora E, Hart Teresa L, Grimm Elizabeth K, Rote Aubrianne E, Strath Scott J
Dept of Human Movement Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA.
J Aging Phys Act. 2012 Jul;20(3):332-44. doi: 10.1123/japa.20.3.332. Epub 2011 Dec 20.
The purpose of the study was to determine the relationship between sedentary behavior (SB), physical activity (PA), and body fat (total, abdominal) or body size (body-mass index [BMI], waist circumference [WC]) in community-dwelling adults 50 yr old and over. This study included 232 ambulatory adults (50-87 yr, 37.4% ± 9.6% body fat [BF]). Average daily time spent in SB (<100 counts/min) and light (100-759 counts/min), lifestyle-moderate (760-1,951 counts/min), walking-moderate (1,952-5,724 cts/min), and vigorous-intensity (≥ 5,725 counts/min) PA were determined by accelerometer and corrected for wear time. BF was measured with dual-energy X-ray absorptiometry. SB was positively related to measures of BF. Measures of SB, PA, and gender accounted for 55.6% of the variance in total BF, 32.4% of the variance in abdominal fat, and 28.0% of the variance in WC. SB, PA, and age accounted for 27.1% of the variance in BMI. Time spent in SB should be considered when designing obesity interventions for adults 50 yr old and over.
该研究的目的是确定50岁及以上社区居住成年人的久坐行为（SB）、身体活动（PA）与体脂（总体脂、腹部脂肪）或身体尺寸（体重指数[BMI]、腰围[WC]）之间的关系。本研究纳入了232名能自主活动的成年人（年龄50 - 87岁，体脂率[BF]为37.4%±9.6%）。通过加速度计测定平均每天花费在久坐行为（每分钟计数<100次）以及轻度（每分钟计数100 - 759次）、生活方式适度（每分钟计数760 - 1951次）、步行适度（每分钟计数1952 - 5724次）和高强度（每分钟计数≥5725次）身体活动上的时间，并根据佩戴时间进行校正。采用双能X线吸收法测量体脂率。久坐行为与体脂测量指标呈正相关。久坐行为、身体活动和性别指标解释了总体脂方差的55.6%、腹部脂肪方差的32.4%以及腰围方差的28.0%。久坐行为、身体活动和年龄解释了体重指数方差的27.1%。在为50岁及以上成年人设计肥胖干预措施时，应考虑久坐行为所花费的时间。
