J Orthop Sports Phys Ther. 1989;10(8):309-14. doi: 10.2519/jospt.1989.10.8.309.
The purpose of this study was to document the difference between eccentric and concentric fatigue of the quadriceps femoris muscle during a maximal effort 40 repetition bout at 180 degrees /sec. Sixteen female volunteers aged 22 to 32 years were tested twice, at least 7 days apart. The left lower extremity of each subject was used during testing on the Kin-Com(R) dynamometer. Subjects were tested through a range of motion of 0 to 90 degrees of knee flexion while seated. Percent decline in peak torque production was then calculated. The results demonstrated that peak torque production during the 40 repetition bout decreased an average of 0.3% for the eccentric trial and an average of 47.7% for the concentric trial. A significant difference in percent decline in peak torque production between concentric and eccentric trials was found to exist (p < 0.0001). The findings of this study indicate that eccentric training may require the performance of many more repetitions than concentric training in order to obtain muscle fatigue. J Orthop Sports Phys Ther 1989;10(8):309-314.
本研究旨在记录在以 180 度/秒的最大努力进行的 40 次重复运动中，股四头肌在离心和向心疲劳之间的差异。16 名年龄在 22 至 32 岁的女性志愿者在至少相隔 7 天的时间内接受了两次测试。在 Kin-Com（R）测力计上对每个受试者的左下肢进行测试。受试者在坐姿下进行 0 到 90 度膝关节弯曲的运动范围内进行测试。然后计算峰值扭矩产生的百分比下降。结果表明，在 40 次重复运动中，离心试验的峰值扭矩产生平均下降 0.3%，向心试验的峰值扭矩产生平均下降 47.7%。发现向心和离心试验之间的峰值扭矩产生百分比下降存在显著差异（p < 0.0001）。本研究的结果表明，为了获得肌肉疲劳，离心训练可能需要比向心训练多进行许多次重复。《矫形与运动物理治疗杂志》1989 年 10 月；10（8）：309-314。
