离心性蹬踏自行车运动是一种替代北欧式腘绳肌练习的方法，可提高未经训练男性膝关节屈肌的神经肌肉功能。
Eccentric Cycling Is an Alternative to Nordic Hamstring Exercise to Increase the Neuromuscular Function of Knee Flexors in Untrained Men.
机构信息
Exercise and Rehabilitation Sciences Institute, School of Physical Therapy, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago, Chile.
Faculty of Health Sciences, Universidad de Las Americas, Santiago, Chile.
出版信息
J Strength Cond Res. 2023 Nov 1;37(11):2158-2166. doi: 10.1519/JSC.0000000000004529.
Valdes, O, Inzulza, S, Collao, N, Garcia-Vicencio, S, Tufano, JJ, Earp, J, Venegas, M, and Peñailillo, L. Eccentric cycling is an alternative to Nordic hamstring exercise to increase the neuromuscular function of knee flexors in untrained men. J Strength Cond Res 37(11): 2158-2166, 2023-Nordic hamstring exercise (NHE) has been proposed to reduce knee flexor (KF) injuries. However, submaximal alternatives to NHE are necessary for the clinical or weaker population. The aim of this study was to compare the effects of Nordic hamstring training (NHT) and eccentric cycling (ECC) training on the neuromuscular function of the KF. Twenty healthy men (27.7 ± 3.5 years) were randomly assigned into 2 groups that performed 10 training sessions (2-3 sessions·week-1) of either NHT (n = 10) or ECC (n = 10). Maximal voluntary isometric contraction of the KF and knee extensor (KE) muscles (MVICKF and MVICKE) was measured, and the hamstring/quadriceps strength (H/Q) ratio was calculated. Furthermore, changes in NHE maximum reaction force (NHE-MRFKF), NHE break-point angle (NHE-BPA), and muscle activity of the semitendinosus (STEMG) and biceps femoris (BFEMG) during the NHE after the interventions were compared. Although no group × time effects were observed (p = 0.09-0.70), but time effects were found for all variables. Pairwise comparisons revealed that MVICKF (+16.9%; p = 0.02), H/Q ratio (+11.8%; p = 0.01), NHE-MRFKF (+19.8%; p = 0.005), and NHE-BPA (+30.8%; p = 0.001) increased after ECC, whereas NHE-MRFKF (+9.7%; p = 0.003), NHE-BPA (+35.5%; p = 0.0002), and STEMG (+33.7%; p = 0.02) increased after NHT. A group × time effect was observed (p = 0.003) in BFEMG, revealing an increase only after ECC (+41.1%; p < 0.0001). Similar neuromuscular adaptations were found after both training modalities. Therefore, ECC provides similar adaptations as NHT and may serve as an alternative form of KF training for those unable to perform NHE.
瓦尔德斯、因苏尔萨、科拉奥、加西亚-维森西奥、图法诺、厄普、贝内格利亚和佩尼亚利洛。离心循环是替代北欧腘绳肌训练的一种方法，可以增加未经训练男性膝关节屈肌的神经肌肉功能。J 力量与调节研究 37(11):2158-2166，2023-北欧腘绳肌训练（NHE）已被提议用于减少膝关节屈肌（KF）受伤。然而，对于临床或较弱的人群来说，需要亚最大替代 NHE。本研究的目的是比较北欧腘绳肌训练（NHT）和离心循环训练（ECC）对 KF 神经肌肉功能的影响。20 名健康男性（27.7±3.5 岁）被随机分为 2 组，每组进行 10 次训练（2-3 次·周-1），分别为 NHT（n=10）或 ECC（n=10）。测量了膝关节屈肌和膝关节伸肌（MVICKF 和 MVICKE）的最大等长收缩力，并计算了腘绳肌/股四头肌的力量（H/Q）比值。此外，还比较了干预后 NHE 最大反应力（NHE-MRFKF）、NHE 断点角度（NHE-BPA）以及半腱肌（STEMG）和股二头肌（BFEMG）的肌肉活动在 NHE 中的变化。尽管未观察到组×时间效应（p=0.09-0.70），但所有变量均显示出时间效应。两两比较显示，MVICKF（+16.9%；p=0.02）、H/Q 比值（+11.8%；p=0.01）、NHE-MRFKF（+19.8%；p=0.005）和 NHE-BPA（+30.8%；p=0.001）在 ECC 后增加，而 NHE-MRFKF（+9.7%；p=0.003）、NHE-BPA（+35.5%；p=0.0002）和 STEMG（+33.7%；p=0.02）在 NHT 后增加。BFEMG 观察到组×时间效应（p=0.003），仅在 ECC 后显示增加（+41.1%；p<0.0001）。两种训练方式均发现类似的神经肌肉适应性。因此，ECC 提供了与 NHT 相似的适应性，并且可以作为无法进行 NHE 的 KF 训练的替代形式。
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