Hackett Daniel A, Cobley Stephen P, Davies Timothy B, Michael Scott W, Halaki Mark
Discipline of Exercise and Sport Science, University of Sydney, Sydney, Australia.
J Strength Cond Res. 2017 Aug;31(8):2162-2168. doi: 10.1519/JSC.0000000000001683.
Hackett, DA, Cobley, SP, Davies, TB, Michael, SW, and Halaki, M. Accuracy in estimating repetitions to failure during resistance exercise. J Strength Cond Res 31(8): 2162-2168, 2017-The primary aim of this study was to assess the accuracy in estimation of repetitions to failure (ERF) during resistance exercise. Furthermore, this investigation examined whether the accuracy in ERF was affected by training status, sex, or exercise type. Eighty-one adults (men, n = 53 and women, n = 28) with broad range of resistance training experience participated in this study. Subjects performed up to 10 sets of 10 repetitions at 70% 1 repetition maximum (1RM) and 80% 1RM for the chest press and leg press, respectively. At the completion of each set, subjects reported their ERF and then continued repetitions to failure to determine actual repetitions to failure (ARF). The accuracy (amount of error) of ERF was determined over an ARF 0-10. Significant differences were found for error of ERF among ARF (p < 0.001), with the error of ERF ∼1 repetition at ARF 0-5 compared with >2 repetitions at ARF 7-10. Greater accuracy was found for the chest press compared with leg press, with the error of ERF ≤1 repetition for ARF 0-5 and ARF 0-3, respectively (p = 0.012). Men were found to be more accurate than women at specific ARFs for the leg press (p = 0.008), whereas no interaction was found for the chest press. Resistance training experience did not affect the accuracy in ERF. These results suggest that resistance trainers can accurately estimate repetitions to failure when close to failure and that ERF could importantly be practically used for prescription and monitoring of resistance exercise.
哈克特，DA，科布利，SP，戴维斯，TB，迈克尔，SW，以及哈拉基，M。抗阻训练中预估至力竭重复次数的准确性。《力量与体能研究杂志》31(8)：2162 - 2168，2017年。本研究的主要目的是评估抗阻训练中预估至力竭重复次数（ERF）的准确性。此外，本调查研究了ERF的准确性是否受训练状态、性别或运动类型的影响。81名具有广泛抗阻训练经验的成年人（男性，n = 53；女性，n = 28）参与了本研究。受试者分别以70%的1次最大重复量（1RM）和80%的1RM进行多达10组每组10次的卧推和腿举练习。每组练习结束时，受试者报告他们的ERF，然后继续重复至力竭以确定实际至力竭重复次数（ARF）。ERF的准确性（误差量）是在ARF为0 - 10的范围内确定的。在ARF之间发现ERF的误差存在显著差异（p < 0.001），与ARF为7 - 10时误差大于2次重复相比，ARF为0 - 5时ERF的误差约为1次重复。与腿举相比，卧推的准确性更高，ARF为0 - 5和ARF为0 - 3时ERF的误差分别≤1次重复（p = 0.012）。发现在腿举的特定ARF时男性比女性更准确（p = 0.008），而卧推未发现交互作用。抗阻训练经验并未影响ERF的准确性。这些结果表明，抗阻训练者在接近力竭时能够准确预估至力竭重复次数，并且ERF在抗阻训练的处方和监测中可能具有重要的实际应用价值。
