Drury Benjamin, Green Thomas, Ramirez-Campillo Rodrigo, Moran Jason
Int J Sports Physiol Perform. 2020 Mar 18;15(7):990-996. doi: 10.1123/ijspp.2019-0184. Print 2020 Aug 1.
This study examined the effects of a 6-week Nordic hamstring exercise (NHE) program in youth male soccer players of less mature (pre-peak height velocity [PHV]) or more mature (mid/post-PHV) status.
Forty-eight participants were separated into pre-PHV (11.0 [0.9] y) or mid/post-PHV (13.9 [1.1]) groups and further divided into experimental (EXP) and control groups with eccentric hamstring strength assessed (NordBord) both before and after the training program. Participants in the EXP groups completed a periodized NHE program performed once or twice weekly over a 6-week period.
The NHE program resulted in moderate and small increases in relative eccentric hamstring strength (in newtons per kilogram) in the pre-PHV EXP (d = 0.83 [0.03-1.68]) and mid-PHV EXP (d = 0.53 [-0.06 to 1.12]) groups, respectively. Moderate increases in the same measure were also seen in the between-groups analyses in the pre-PHV (d = 1.03 [0.23-1.84]) and mid-PHV (d = 0.87 [0.22-1.51]) groups, with a greater effect observed in the former.
The results from this study demonstrate that a 6-week NHE program can improve eccentric hamstring strength in male youth soccer players, with less-mature players achieving mostly greater benefits. The findings from this study can aid in the training prescription of NHE in youth male soccer players.
本研究考察了为期6周的北欧式腿筋练习（NHE）计划对未成熟（身高增长速度峰值前[PHV]）或更成熟（身高增长速度峰值中/后）状态的青年男性足球运动员的影响。
48名参与者被分为身高增长速度峰值前组（11.0[0.9]岁）或身高增长速度峰值中/后组（13.9[1.1]岁），并进一步分为实验组（EXP）和对照组，在训练计划前后均评估了腿筋离心力量（使用NordBord）。实验组的参与者完成了一个周期化的NHE计划，在6周内每周进行一次或两次。
NHE计划使身高增长速度峰值前实验组（d = 0.83[0.03 - 1.68]）和身高增长速度峰值中实验组（d = 0.53[-0.06至1.12]）的相对腿筋离心力量（以牛顿每千克计）分别有中度和小幅增加。在身高增长速度峰值前组（d = 1.03[0.23 - 1.84]）和身高增长速度峰值中组（d = 0.87[0.22 - 1.51]）的组间分析中也观察到相同指标的中度增加，在前一组中观察到的效果更大。
本研究结果表明，为期6周的NHE计划可以提高青年男性足球运动员的腿筋离心力量，未成熟的运动员大多受益更大。本研究结果有助于为青年男性足球运动员制定NHE训练方案。
