Petrofsky J S, Phillips C A
J Hum Ergol (Tokyo). 1980 Dec;9(2):125-31.
Ten male and ten female volunteers served as subjects in these experiments to determine the effect of elbow angle on isometric strength of the biceps muscles and on the ability to sustain an isometric tension to fatigue (endurance). As reported by others, we found that for each individual, there existed one elbow angle at which he or she could exert his greatest isometric strength. When maintaining an absolute work load to fatigue, exercise at this angle resulted in the longest endurance; in contrast, endurance was the same at any work load relative to the maximum strength for a given elbow angle.
十名男性和十名女性志愿者参与了这些实验，以确定肘部角度对肱二头肌等长肌力以及维持等长张力直至疲劳（耐力）能力的影响。正如其他人所报告的，我们发现，对于每个人来说，都存在一个肘部角度，在这个角度下他或她能够发挥出最大的等长肌力。当保持绝对工作量直至疲劳时，在这个角度进行锻炼会产生最长的耐力；相比之下，在任何相对于给定肘部角度最大力量的工作量下，耐力都是相同的。
