■确定体力活动是否与一般人群中的下肢肌肉大小和力量有关。
■从一开始就使用3种主要结构系统地搜索了六个数据库:下肢,肌肉体积,和肌肉力量。
■测量体力活动的研究(使用客观或主观测量),下肢肌肉大小,和力量都包括在内。在分析之前,使用先前发布的年龄和性别特定的标准值对可用的离散组数据进行标准化。
■最终分析包括来自5402项研究的初始产量的47项研究。对97个离散组计算了结果测量的标准化分数。
■如预期的那样,下肢肌肉大小与下肢肌力呈正相关(r=0.26,P<0.01;n=4812)。客观测量的身体活动(即,加速计,步法)(n=1944)与下肢肌肉大小(r=0.30,P<.01;n=1626)和下肢力量(r=0.24,P<.01;n=1869)均呈正相关。然而,主观测量的身体活动(即,问卷)(n=3949)与下肢肌肉大小(r=-0.59,P<.01;n=3243)和下肢肌肉力量(r=-0.48,P<。01;n=3882)。
■这项审查确定,身体活动的客观指标与下肢肌肉大小和肌肉力量适度相关,可以,因此,用于预测与基于运动的康复计划相关的下肢肌肉变化。
UNASSIGNED: To determine whether physical activity is associated with lower limb muscle size and strength within the general population.
UNASSIGNED: Six databases were systematically searched from inception using 3 main constructs: lower extremity, muscle volume, and muscle strength.
UNASSIGNED: Studies that measured physical activity (using either objective or subjective measurements), lower limb muscle size, and strength were included. Available discrete group data were standardized using previously published age- and sex-specific normative values prior to analysis.
UNASSIGNED: The final analysis included 47 studies from an initial yield of 5402 studies. Standardized scores for outcome measures were calculated for 97 discrete groups.
UNASSIGNED: As anticipated, lower limb muscle size was positively correlated with lower limb muscle strength (r=0.26, P<.01; n=4812). Objectively measured physical activity (ie, accelerometry, pedometry) (n=1944) was positively correlated with both lower limb muscle size (r=0.30, P<.01; n=1626) and lower limb strength (r=0.24, P<.01; n=1869). However, subjectively measured physical activity (ie, questionnaires) (n=3949) was negatively associated with lower limb muscle size (r=-0.59, P<.01; n=3243) and lower limb muscle strength (r=-0.48, P<. 01; n=3882).
UNASSIGNED: This review identified that objective measures of physical activity are moderately associated with lower limb muscle size and muscle strength and can, therefore, be used to predict muscle changes within the lower limbs associated with exercise-based rehabilitation programs.