Effect of contraction mode of slow-speed resistance training on the maximum rate of force development in the human quadriceps
Effect of contraction mode of slow-speed resistance training on the maximum rate of force development in the human quadriceps
复制标题
DOI：
10.1002/mus.21021
复制
发表时间：
2008-09-01
期刊：
影响因子：
3.4
通讯作者：
Aagaard, Per
中科院分区：
文献类型：
--
作者：
Blazevich, Anthony J.;Horne, Sara;Aagaard, Per
本研究考察了慢速阻力训练包括同心（CON, n = 10）和偏心（ECC, n = 11）单关节肌肉收缩对力量发展收缩率（RFD）和神经肌肉活动（EMG）的影响，并通过去训练来维持。进行等速膝关节伸展训练。第一周，连续10周。最大等距强度（+11.2%）和RFD（分别为0 ~ 30/50/100/200 ms， +10.5% ~ 20.5%）在10周后显著升高（P < 0.01 ~ 0.05）；然而，训练方式没有影响。肌电信号峰值振幅和上升速率随训练和去训练均无显著变化。0周时RFD低于中位数（RFD/MVC）的受试者在5周和10周训练后RFD显著增加，这与神经肌肉活动增加有关。在去训练后保持较高RFD的受试者在去训练时也表现出较高的活动。因此，只有在训练前快速达到最大力量的能力较弱的受试者才能通过慢速阻力运动改善RFD。
This study examined the effects of slow-speed resistance training involving concentric (CON, n = 10) versus eccentric (ECC, n = 11) single-joint muscle contractions on contractile rate of force development (RFD) and neuromuscular activity (EMG), and its maintenance through detraining. Isokinetic knee extension training was performed 3 . week 1 for 10 weeks. Maximal isometric strength (+11.2%) and RFD (measured from 0-30/50/100/200 ms, respectively; +10.5%-20.5%) increased after 10 weeks (P < 0.01-0.05); however, there was no effect of training mode. Peak EMG amplitude and rate of EMG rise were not significantly altered with training or detraining. Subjects with below-median normalized RFD (RFD/MVC) at 0 weeks significantly increased RFD after 5- and 10-weeks training, which was associated with increased neuromuscular activity. Subjects who maintained their higher RFD after detraining also exhibited higher activity at detraining. Thus, only subjects with a lesser ability to rapidly attain their maximum force before training improved RFD with slow-speed resistance exercise.