Hackett Daniel A, Selvanayagam Victor S, Halaki Mark, Cobley Stephen P
Exercise, Health and Performance Faculty Research Group, Faculty of Health Sciences, The University of Sydney, Lidcombe, NSW 2141, Australia.
Centre for Sport and Exercise Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia.
J Funct Morphol Kinesiol. 2019 Aug 9;4(3):56. doi: 10.3390/jfmk4030056.
The ability to accurately identify proximity to momentary failure during a set of resistance exercise might be important to maximise training adaptations. This study examined the association between perceptual fatigue and the accuracy of the estimated repetitions to failure (ERF). Twenty-seven males and eleven females performed sets of 10 repetitions at specific loads for the chest press and leg-press. Following the completion of 10 repetitions, participants rated their fatigue and ERF and then proceeded to concentric failure (actual repetitions to failure) to determine the ERF accuracy (i.e., error-ERF). Small correlations were found between perceptual fatigue and error-ERF for the chest-press ( = -0.26, = 0.001) and the leg-press ( = -0.18, = 0.013). For actual repetitions to failure and error-ERF, a strong correlation was found for the chest-press ( = 0.68, < 0.001) and a very strong correlation was foundfor the leg-press ( = 0.73, < 0.001). Moderate correlations were found between perceptual fatigue and actual repetitions to failure for the chest-press ( = -0.42, < 0.001) and leg-press ( = -0.40, < 0.001). Overall, findings suggest that the accuracy of the estimated repetitions to failure is more strongly associated with proximity to task repetition failure rather than subjective feelings of fatigue.
在一组抗阻训练中准确识别接近瞬间失败的能力，对于最大化训练适应性可能很重要。本研究考察了感知疲劳与估计至力竭重复次数（ERF）准确性之间的关联。27名男性和11名女性在特定负荷下进行了每组10次重复的卧推和腿举训练。完成10次重复后，参与者对自己的疲劳程度和ERF进行评分，然后进行向心收缩至力竭（实际至力竭重复次数），以确定ERF的准确性（即ERF误差）。发现卧推时感知疲劳与ERF误差之间存在小的相关性（r = -0.26，p = 0.001），腿举时也存在小的相关性（r = -0.18，p = 0.013）。对于实际至力竭重复次数和ERF误差，卧推时发现强相关性（r = 0.68，p < 0.001），腿举时发现非常强的相关性（r = 0.73，p < 0.001）。卧推时感知疲劳与实际至力竭重复次数之间存在中等相关性（r = -0.42，p < 0.001），腿举时也存在中等相关性（r = -0.40，p < 0.001）。总体而言，研究结果表明，估计至力竭重复次数的准确性与接近任务重复失败的程度更为密切相关，而非疲劳的主观感受。
