Vianna Karoline Baptista, Rodrigues Lívia Gonçalves, Oliveira Nathalia Trevisol, Ribeiro-Alvares João Breno, Baroni Bruno Manfredini
Universidade Federal de Ciências da Saúde de Porto Alegre.
Int J Sports Phys Ther. 2021 Apr 1;16(2):459-467. doi: 10.26603/001c.19452.
Training programs that include the Nordic hamstring exercise (NHE) have been shown to increase eccentric knee flexor strength and biceps femoris fascicle length in male athletes. However, the effect of NHE on female athletes remains unknown.
To investigate the collective and individual responses of professional female soccer players engaged in a preseason training program with the NHE regarding eccentric knee flexor strength and biceps femoris long head fascicle length.
Quasi-experimental study.
Sixteen amateur female soccer players (without a NHE training routine) were evaluated 8-weeks apart to: (1) assess reliability of eccentric knee flexor strength and biceps femoris fascicle length measures; and (2) determine the typical error of measures that would be used to discriminate training responders and non-responders. The NHE training group had 17 professional female soccer players who performed an 8-week training program with the NHE during preseason. Within-group analysis was performed with paired sample t-tests (pre- vs. post-training), and individual responses were determined using the typical error criteria.
The non-trained group's data demonstrated that measures of strength (ICC=0.82-0.87, typical error = 12-13 N) and fascicle length (ICC=0.92-0.97; typical error = 0.19-0.38 cm) were reliable. In the NHE training group, both limbs increased the eccentric knee flexor strength (13%; ES=0.74-0.82) and the biceps femoris fascicle length (6%; ES=0.44-0.65). Twelve players (71%) were considered responders to the NHE training program for the eccentric knee flexor strength, while eight athletes (47%) were responders for the biceps femoris fascicle length.
The 8-week preseason training program with the NHE increased both eccentric knee flexor strength and biceps femoris fascicle length in professional female soccer players. More than two-thirds of players demonstrated a meaningful increase in eccentric strength, while nearly half achieved consistent fascicle length increases with the NHE training.
包括北欧腘绳肌练习（NHE）的训练计划已被证明可增加男性运动员的离心膝关节屈肌力量和股二头肌肌束长度。然而，NHE对女性运动员的影响仍不清楚。
研究参加包含NHE的季前训练计划的职业女足运动员在离心膝关节屈肌力量和股二头肌长头肌束长度方面的集体和个体反应。
准实验研究。
16名业余女足运动员（无NHE训练常规）在8周的间隔时间内接受评估，以：（1）评估离心膝关节屈肌力量和股二头肌肌束长度测量的可靠性；（2）确定用于区分训练反应者和非反应者的测量的典型误差。NHE训练组有17名职业女足运动员，她们在季前赛期间进行了为期8周的NHE训练计划。组内分析采用配对样本t检验（训练前与训练后），个体反应根据典型误差标准确定。
未训练组的数据表明，力量测量（组内相关系数=0.82-0.87，典型误差=12-13 N）和肌束长度测量（组内相关系数=0.92-0.97；典型误差=0.19-0.38 cm）是可靠的。在NHE训练组中，双下肢的离心膝关节屈肌力量（约13%；效应量=0.74-0.82）和股二头肌肌束长度（约6%；效应量=0.44-0.65）均增加。12名运动员（约71%）被认为是离心膝关节屈肌力量NHE训练计划的反应者，而8名运动员（约47%）是股二头肌肌束长度的反应者。
为期8周的包含NHE的季前训练计划增加了职业女足运动员的离心膝关节屈肌力量和股二头肌肌束长度。超过三分之二的运动员离心力量有显著增加，而近一半的运动员通过NHE训练使肌束长度持续增加。
