PDF(Pubmed)
Abstract：
Trunk muscles maintain steady effort with adequate strength and endurance. When the muscle performance is subpar, it might cause lower back discomfort. No reference for trunk strength and endurance has been established previously. The aim of this study was to determine the normative reference values for dynamometric and non-dynamometric tests in people with various body fat percentages. Two hundred sixty-four participants aged 19-40 years old were recruited in this cross-sectional study. The Siri equation was used to calculate the individuals body fat proportions, which were divided into normal, high, and very high body fat for men and women. The Modified Sorenson\'s and the Back-Leg-Chest Dynamometric tests were utilized to measure muscular performance. The means of strength in females with normal, high, and very high body fat percentages were 27.39, 25.75, and 25.37 N/m2, respectively. The males in the same category had the means of 56.48, 51.79, and 60.17 N/m2, respectively. The highest mean of endurance in females was in those with normal body fat percentage (42.28), so did males (71.02). Our findings suggest that males had higher trunk muscle strength and endurance than females, and normal-body-fat individuals had the greatest endurance regardless of gender.
摘要：
躯干肌肉以足够的力量和耐力保持稳定的努力。当肌肉表现低于标准时，它可能会导致下背部不适。以前没有建立躯干强度和耐力的参考。这项研究的目的是确定具有不同体脂百分比的人的测力和非测力测试的规范参考值。在这项横断面研究中，招募了年龄在19-40岁之间的二百六十名参与者。Siri方程用于计算个体的体脂比例，分为正常，高,男性和女性的身体脂肪含量很高。改良索伦森和后腿胸部测力测试用于测量肌肉性能。女性的力量手段与正常，高,和非常高的体脂百分比分别为27.39、25.75和25.37N/m2。同一类别中的男性的平均值分别为56.48、51.79和60.17N/m2。女性的耐力平均值最高的是体脂百分比正常的女性（42.28），男性也是如此（71.02）。我们的研究结果表明，男性的躯干肌肉力量和耐力高于女性，无论性别如何，正常体脂个体的耐力最大。
