Muscle force and muscle torque in humans require different methods when adjusting for differences in body size
Muscle force and muscle torque in humans require different methods when adjusting for differences in body size
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DOI：
10.1007/s00421-002-0638-9
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发表时间：
2002-07-01
影响因子：
3
通讯作者：
Johansson, H
中科院分区：
文献类型：
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作者：
Jaric, S;Radosavljevic-Jaric, S;Johansson, H
在各种医学、人体工程学和运动相关研究中，当呈现肌肉功能测试结果时，已经提出或应用了用于调整肌肉力量（S）的不同方法，以针对身体尺寸的各种估计值[例如体重（m）或偶尔的一些其他人体测量值]的差异进行归一化。然而，当记录肌肉扭矩（使用标准等速装置测量）和肌肉力量（使用测力计测量）时，5和身体尺寸之间的关系可能不同的事实没有被考虑在内。为了解决这个问题，我们测试了肌肉力量和肌肉扭矩等长条件下，在六个不同的肌肉群。假设S和m之间的关系为S = k.m（B），根据我们开发的基于几何相似性的简单力学模型，对于扭矩和力，指数参数B预计分别等于1.00和0.67。在测试的6个肌肉组中的5个肌肉组中，肌肉扭矩的参数B的实验获得值高于肌肉力量（P=0.068; Wilcoxon配对检验）。尽管分布相对较广，但平均值（SD）也接近预测值，分别为肌肉力量和肌肉扭矩的B=0.67（0.19）（对应于异速生长标度法）和B=1.02（0.34）（对应于比率标准法）。因此，我们的结论是，比例标准和异速生长缩放应采用调整S的身体尺寸时，肌肉扭矩和肌肉力量，分别测试。
Different methods for adjusting muscle strength (S) to normalise for differences in various estimates of body size [such as body mass (m) or, infrequently, some other anthropometrical measurements] have been either proposed or applied when presenting the results of muscle function tests in various medical, ergonomic, and sport related studies. However, the fact that the relationship between 5 and body size may differ when muscle torque (measured using a standard isokinetic apparatus) and muscle force (measured using a dynamometer) are recorded has not been taken into account. To address this problem, we tested both muscle force and muscle torque under isometric conditions in six different muscle groups. The relationship assumed between S and m was S = k.m(b) and, according to a simple mechanical model based on geometrical similarity we developed, the exponential parameter b would be expected to equal 1.00 and 0.67 for torque and force, respectively. The experimentally obtained values for the parameter b were higher for muscle torque than for muscle force in five out of the six muscle groups tested (P=0.068; Wilcoxon matched pairs test). Despite a relatively wide scatter, the mean (SD) values were also close to those predicted, being b=0.67 (0.19) (corresponding to the allometric scaling method) and b=1.02 (0.34) (corresponding to the ratio standards method) for muscle force and for muscle torque, respectively. Therefore, we concluded that the ratio standards and allometric scaling should be employed to adjust S for body size when muscle torque and muscle force, respectively, are tested.