Department of Physical Therapy and Health Rehabilitation, College of Applied Medical Sciences, Aljouf University, Sakaka, Kingdom of Saudi Arabia.
Physiother Theory Pract. 2013 Jan;29(1):61-6. doi: 10.3109/09593985.2012.673697. Epub 2012 Apr 10.
The purpose of this study was to compare isometric strength of elbow extensors measured in supine- and prone-lying positions at elbow flexion angles of 45 and 90 degrees. Twenty-two male subjects under single-blind procedures participated in the study. Each subject participated in both supine-lying and prone-lying measuring protocols. Calibrated cable tensiometer was used to measure isometric strength of the right elbow extensors and a biofeedback electromyography was used to assure no substitution movements from shoulder girdle muscles. The mean values of isometric strength of elbow extensors measured from supine-lying position at elbow flexion angles of 45 and 90 degrees were 11.1 ± 4.2 kg and 13.1 ± 4.6 kg, while those measured from prone-lying position were 9.9 ± 3.6 kg and 12 ± 4.2 kg, respectively. There is statistical significant difference between the isometric strength of elbow extensors measured from supine-lying position at elbow flexion angles of 45 and 90 degrees compared to that measured from prone-lying position (p < 0.05). The results suggest that in manual muscle testing starting position can affect the isometric strength of elbow extensors since supine-lying starting position is better than prone-lying starting position.
本研究旨在比较在 45 度和 90 度屈肘角度下仰卧位和俯卧位时肘伸肌的等长力量。22 名男性受试者在单盲程序下参与了这项研究。每个受试者都参加了仰卧位和俯卧位的测量方案。校准的电缆张力计用于测量右侧肘伸肌的等长力量，生物反馈肌电图用于确保肩部肌肉没有替代运动。在 45 度和 90 度屈肘角度下从仰卧位测量的肘伸肌等长力量的平均值分别为 11.1±4.2kg 和 13.1±4.6kg，而从俯卧位测量的平均值分别为 9.9±3.6kg 和 12±4.2kg。与俯卧位相比，在 45 度和 90 度屈肘角度下从仰卧位测量的肘伸肌等长力量有统计学显著差异（p<0.05）。结果表明，在手动肌肉测试中，起始位置会影响肘伸肌的等长力量，因为仰卧位起始位置优于俯卧位起始位置。
