Department of Applied Sport Sciences, Hartpury University, Gloucestershire, United Kingdom.
Sport Science Department, Bristol City Football Club, United Kingdom.
J Athl Train. 2021 Sep 1;56(9):952-959. doi: 10.4085/318-20.
The Nordic hamstring exercise (NHE) is known to reduce hamstrings injury risk in athletes. To optimize the NHE, it is important to understand how acute resistance-training variables influence its performance.
To examine the effects of different interset rest intervals (ISRIs) on force indices during performance of the NHE.
Crossover study.
Laboratory.
Ten well-trained, young, male, team-sport athletes (age = 20.7 ± 2.3 years, height = 179.4 ± 5.5 cm, mass = 83.9 ± 12.4 kg).
INTERVENTION(S): Participants performed 2 sets of 6 repetitions of the NHE with either a 1- or 3-minute ISRI. All sets were performed using the NordBord.
MAIN OUTCOMES MEASURE(S): Peak force (newtons), average force (newtons), percentage maintenance, and percentage decline were recorded for both the dominant and nondominant limbs, and interlimb force asymmetries (percentages) were calculated.
No interactions or main effects (P > .05) were present between conditions or sets for any variables. However, individual repetitions showed reductions (P< .05; effect size range = 0.58-1.28) in peak force from repetition 4 onward.
Our findings suggest that a 1-minute ISRI was sufficient to maintain force-production qualities and interlimb asymmetries between sets during the NHE in well-trained athletes. Nonetheless, practitioners should be aware of the potentially large decrements in peak force production that may occur within the set.
众所周知，北欧腘绳肌训练（NHE）可以降低运动员腘绳肌受伤的风险。为了优化 NHE，了解急性抗阻训练变量如何影响其表现是很重要的。
研究不同组间休息间隔（ISRI）对 NHE 性能时力指数的影响。
交叉研究。
实验室。
10 名训练有素的年轻男性团队运动运动员（年龄=20.7±2.3 岁，身高=179.4±5.5cm，体重=83.9±12.4kg）。
参与者用 1 分钟或 3 分钟的 ISRI 进行 2 组 6 次 NHE 的重复。所有组均使用 NordBord 进行。
记录主导和非主导肢体的峰值力（牛顿）、平均力（牛顿）、保持百分比和下降百分比，并计算四肢力的不对称性（百分比）。
在任何变量中，条件或组之间均未出现交互或主要影响（P＞.05）。然而，个别重复显示，从第 4 次重复开始，峰值力降低（P＜.05；效应大小范围为 0.58-1.28）。
我们的研究结果表明，在训练有素的运动员中，1 分钟的 ISRI 足以维持 NHE 组间的力量产生质量和四肢间的不对称性。尽管如此，从业者应该注意到，在一组内，峰值力的产生可能会出现大幅下降。
