Industrial and Systems Engineering, University at Buffalo, Buffalo, New York, United States of America.
Industrial and Systems Engineering, Texas A&M University, College Station, Texas, United States of America.
PLoS One. 2019 Jul 1;14(7):e0219090. doi: 10.1371/journal.pone.0219090. eCollection 2019.
The main goal of this study was to investigate the reliability of muscle strength across different levels of obesity. A sample of 142 healthy subjects performed maximum voluntary isometric contractions for shoulder flexion and trunk extension on each of four days. Subjects were recruited into one of three groups, non-obese, overweight, or obese, based on body mass index (BMI). Reliability of the strength measurements within each session and across the four sessions was determined from the intraclass correlation coefficient, coefficient of repeatability, coefficient of variation, and standard error of measurement. For the shoulder flexion measures, the coefficient of variation was < 10% and intraclass correlation coefficient was > 0.75. The absolute reliability of trunk extension strength measurement was rejected due to a high variability across sessions. For both tasks, comparable strengths across the BMI groups were found.
本研究的主要目的是探究不同肥胖程度下肌肉力量的可靠性。142 名健康受试者在四天内分别对肩部屈曲和躯干伸展进行了最大随意等长收缩。根据身体质量指数（BMI），受试者被分为非肥胖、超重或肥胖三组。通过组内相关系数、可重复性系数、变异系数和测量标准误差来确定每次测量和四次测量的强度测量可靠性。对于肩部屈曲测量，变异系数<10%，组内相关系数>0.75。由于各次测量之间的变异性很大，躯干伸展强度测量的绝对可靠性被拒绝。对于这两个任务，在 BMI 组之间发现了可比较的力量。
