Júdice Pedro B, Silva Analiza M, Magalhães João P, Matias Catarina N, Sardinha Luís B
a Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana , Universidade de Lisboa , Lisboa , Portugal.
J Sports Sci. 2014;32(19):1760-7. doi: 10.1080/02640414.2014.926382. Epub 2014 Jun 10.
Overweight and obesity are defined as abnormal or excessive fat accumulation that presents a health risk. Even in athletes an increased adiposity affects health and performance. Sedentary behaviour has been associated with higher levels of adiposity, independent of moderate-to-vigorous physical activity. However, it is unclear whether this independent relationship still exists in highly trained athletes. The aim of this study was to examine the association of sedentary behaviour with body fatness in elite athletes. Cross-sectional data from 82 male athletes (mean age 22 years) were used. Total and regional body composition was measured by dual energy X-ray absorptiometry. Self-reported time spent in sedentary behaviour and weekly training time was assessed in all participants at one time point and multiple regression analyses were used. Sedentary behaviour predicted total fat mass (β = 0.77; 95% CI: 0.36-1.19, P < 0.001) and trunk fat mass (β = 0.25; 95% CI: 0.07-0.43, P = 0.007), independent of age, weekly training time, and residual mass (calculated as weight-dependent variable) but not abdominal fat. Also, no associations of sedentary behaviour with fat-free mass, appendicular lean soft tissue, and body mass index were found. These findings indicate that athletes with higher amounts of sedentary behaviour presented higher levels of total and trunk fatness, regardless of age, weekly training time, and residual mass. Therefore, even high moderate-to-vigorous physical activity levels do not mitigate the associations between sedentary behaviour and body fatness in highly trained athletes.
超重和肥胖被定义为异常或过度的脂肪堆积，会带来健康风险。即使在运动员中，体脂增加也会影响健康和运动表现。久坐行为与较高的体脂水平相关，且独立于中等到剧烈的体力活动。然而，在训练有素的运动员中，这种独立关系是否仍然存在尚不清楚。本研究的目的是探讨精英运动员久坐行为与体脂的关联。使用了82名男性运动员（平均年龄22岁）的横断面数据。通过双能X线吸收法测量全身和局部身体成分。在一个时间点对所有参与者评估自我报告的久坐行为时间和每周训练时间，并进行多元回归分析。久坐行为可预测总脂肪量（β = 0.77；95%置信区间：0.36 - 1.19，P < 0.001）和躯干脂肪量（β = 0.25；95%置信区间：0.07 - 0.43，P = 0.007），独立于年龄、每周训练时间和去脂体重（计算为体重相关变量），但与腹部脂肪无关。此外，未发现久坐行为与去脂体重、上肢瘦软组织和身体质量指数之间存在关联。这些发现表明，久坐行为较多的运动员，无论年龄、每周训练时间和去脂体重如何，其总脂肪量和躯干脂肪量水平都较高。因此，即使是高水平的中等到剧烈体力活动，也不能减轻训练有素的运动员中久坐行为与体脂之间的关联。
