Effects of unilateral concentric-only dynamic constant external resistance training
Effects of unilateral concentric-only dynamic constant external resistance training
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DOI：
10.1055/s-2007-972857
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发表时间：
1996-07-01
影响因子：
2.5
通讯作者：
Weir, LL
中科院分区：
文献类型：
--
作者：
Housh, TJ;Housh, DJ;Weir, LL
本研究的目的是检查单侧集中式腿部伸展动态恒定外阻力（DCER）训练对以下方面的影响：（a）训练和对侧的同心DCER强度（未训练的）腿，（B）训练的和对侧腿中的同心等速峰值扭矩-速度曲线，和（c）停止训练后，在训练的腿和对侧腿中保持同心DCER强度和同心等速峰值扭矩。16名成年男性（（X）年龄超过酒吧+/- SD = 24.0 +/- 4.0岁）志愿者组成训练组（TR，n = 8）和对照组（CTL，n = 8）。TR组训练非优势肢体，进行仅集中腿部伸展DCER运动（3-5组，6次重复，80%的一次重复最大负荷）8周，然后再停止训练8周。CTL组未进行训练。所有受试者均在训练前、训练后和停止训练时进行单侧集中式腿部伸展DCER强度测试，以及在1.05、2.09、3.14、4.19和5.24 rad下的集中式等速峰值扭矩测试。s（-1）在两条腿上。混合因子方差分析、随访和事后分析表明，训练导致DCER强度增加：在训练腿（42%）和对侧（15%）中，以及在速度范围为1.05至5.24 rad时训练腿（7- 19%）的等速峰值扭矩。s（-1）。然而，对于等速峰值扭矩没有交叉训练效应。此外，训练诱导的DCER力量和等速峰值扭矩的增加在8周的停训中得以保留。
The purposes of this investigation were to examine the effects of unilateral concentric-only leg extension dynamic constant external resistance (DCER) training on: (a) concentric DCER strength in the trained and contralateral (untrained) legs, (b) concentric isokinetic peak torque-velocity curves in the trained and contralateral legs, and (c) retention of concentric DCER strength and concentric isokinetic peak torque in the trained and contralateral legs following detraining. Sixteen adult male ((X) over bar age +/- SD = 24.0 +/- 4.0 yr) volunteers comprised training (TR, n = 8) and control (CTL, n = 8) groups. The TR group trained the nondominant limb with concentric-only leg extension DCER exercise (3-5 sets of 6 repetitions at 80 % of one-repetition maximum load) for eight weeks followed by eight additional weeks of detraining. The CTL group did not train. All subjects were tested pretraining, posttraining and detraining for unilateral concentric-only leg extension DCER strength as well as concentric isokinetic peak torque at 1.05, 2.09, 3.14, 4.19, and 5.24 rad . s(-1) in both legs. Mixed factorial ANOVAs, fellow-up, and post-hoc analyses indicated that the training result-ed in increased DCER strength:in both the trained (42 %) and contralateral (15 %) legs as well as isokinetic peak torque in the trained leg (7-19 %) at velocities ranging from 1.05 to 5.24 rad . s(-1). There was no cross-training effect, however, for isokinetic peak torque. Furthermore, the training-induced increases in DCER strength and isokinetic peak torque were retained across eight weeks of detraining.