Nishida Satoru, Ito Wataru, Ohishi Taisuke, Yoshida Riku, Sato Shigeru, Nakamura Masatoshi
Faculty of Sport and Health Sciences Ryutsu Keizai University.
Niigata University of Rehabilitation.
Int J Sports Phys Ther. 2024 Oct 1;19(10):1197-1203. doi: 10.26603/001c.123473. eCollection 2024.
The Nordic hamstring exercise (NHE) is useful for preventing hamstring strain injuries. However, its adoption rates in the sports field are currently low, necessitating a safe and efficient introduction.
HYPOTHESIS/PURPOSE: The purpose was to examine the relationship between the eccentric force during the NHE and the one repetition maximum of deadlift. It was hypothesized that the eccentric force during the NHE would be correlated with the one repetition maximum (1RM) of the deadlift.
Cross-sectional study.
Healthy student rugby players with no history of hamstring tears were recruited to participate. The peak eccentric forces during the NHE, which is the vertical peak force on the part holding the leg, were measured in both legs, while gradually leaning forward to a prone position over three seconds. The 1RM of deadlift was calculated from the weight that could be raised three times during a deadlift (x kg) using the estimated formula (x kg / 0.93). The correlation between the left and right peak eccentric forces during the NHE, the total left and right forces, and the 1RM of the deadlift was examined using Spearman's rank correlation coefficient, with all values corrected for body mass.
During the NHE, the peak eccentric force of the right and left legs and the total peak eccentric force of both legs were 3.8 ± 1.1 N/BM, 3.8 ± 1.2 N/BM, and 7.6 ± 2.1 N/BM, respectively. The 1RM of deadlift was 1.9 ± 0.3 kg/BM. Weak correlations (r = 0.34-0.37) were found between the 1RM of the deadlift and the peak eccentric force in the right and left legs and the total peak eccentric force of both legs.
The present study revealed a weak correlation between the peak eccentric force during the NHE and 1RM of deadlift.
2c.
北欧腿弯举练习（NHE）对预防腘绳肌拉伤很有用。然而，目前其在体育领域的采用率较低，因此需要安全有效地引入。
假设/目的：目的是研究NHE期间的离心力与硬拉一次重复最大值之间的关系。假设NHE期间的离心力与硬拉的一次重复最大值（1RM）相关。
横断面研究。
招募无腘绳肌撕裂史的健康学生橄榄球运动员参与。在双腿上测量NHE期间的峰值离心力，即支撑腿部部分的垂直峰值力，同时在三秒内逐渐向前倾至俯卧位。硬拉的1RM通过使用估计公式（x kg / 0.93）根据硬拉过程中能举起三次的重量（x kg）来计算。使用Spearman等级相关系数检验NHE期间左右峰值离心力、左右总力与硬拉1RM之间的相关性，所有值均根据体重进行校正。
在NHE期间，左右腿的峰值离心力和双腿的总峰值离心力分别为3.8±1.1 N/BM、3.8±1.2 N/BM和7.6±2.1 N/BM。硬拉的1RM为1.9±0.3 kg/BM。在硬拉的1RM与左右腿的峰值离心力以及双腿的总峰值离心力之间发现了弱相关性（r = 0.34 - 0.37）。
本研究揭示了NHE期间的峰值离心力与硬拉1RM之间存在弱相关性。
2c。
