Baker J S, Gal J, Davies B, Bailey D M, Morgan R M
Health and Exercise Science Research Laboratory, School of Applied Sciences, University of Glamorgan, Pontypridd, Wales.
J Sci Med Sport. 2000 Dec;3(4):360-8. doi: 10.1016/s1440-2440(00)80003-1.
Indices of mechanical power output were obtained from twelve subjects during high intensity leg cycle ergometry tests (20 second duration; 75 grams per kilogram total body mass) using two protocols: one with a standard handle-bar grip (with-grip), and one with supinated wrists (without-grip). Peak mechanical power, mean mechanical power, fatigue index and total mechanical work values were calculated for each subject during each test, and the sample mean differences associated with the two protocols were compared using paired Student t-tests. The with-grip protocol yielded significantly greater peak mechanical power output and greater fatigue index than the without-grip protocol (886 +/- 124W and 815 +/- 151W, respectively; and 35 +/- 10% and 25 +/- 8%, respectively; p<0.01). The electrical activity of the anterior forearm musculature was measured in the twelfth subject during the performance of each of the test protocols. While peak mechanical power output was greater during the with-grip protocol, than during the without-grip protocol, the electromyographs showed much greater forearm muscle activity during the with-grip protocol. Thus the protocol which allowed for the greatest measure of peak leg power output was also associated with considerable arm muscle activity. These findings should be considered when biochemical and physiological measurements are obtained from arm blood samples.
在高强度腿部周期测力计测试（持续20秒；总体重每千克75克）期间，使用两种方案从12名受试者身上获取机械功率输出指标：一种是标准车把握法（有握法），另一种是旋后腕部（无握法）。在每次测试期间计算每个受试者的峰值机械功率、平均机械功率、疲劳指数和总机械功值，并使用配对学生t检验比较与两种方案相关的样本均值差异。与无握法方案相比，有握法方案产生的峰值机械功率输出显著更大，疲劳指数也更高（分别为886±124瓦和815±151瓦；以及分别为35±10%和25±8%；p<0.01）。在第12名受试者执行每个测试方案期间，测量了前臂前部肌肉组织的电活动。虽然有握法方案期间的峰值机械功率输出比无握法方案期间更大，但肌电图显示有握法方案期间前臂肌肉活动要大得多。因此，允许最大程度测量腿部峰值功率输出的方案也与相当大的手臂肌肉活动相关。当从手臂血样中获取生化和生理测量值时，应考虑这些发现。
