Medina-Perez Carlos, de Souza-Teixeira Fernanda, Fernandez-Gonzalo Rodrigo, de Paz-Fernandez Jose Antonio
Institute of Biomedicine (IBIOMED), University of Leon, León, Spain.
School of Physical Education, Department of Physical Education and Health, Federal University of Pelotas, Pelotas/rs, Brazil.
NeuroRehabilitation. 2014;34(3):523-30. doi: 10.3233/NRE-141062.
Although resistance training adaptations in multiple sclerosis (MS) patients have been described, the detraining response in this population is largely unknown.
[corrected] This study was designed to evaluate the effects of a 12-week detraining period on muscle strength (isometric and endurance) and muscle power of multiple sclerosis (MS) patients that had previously carried out a 12-week resistance training program (RTP).
Forty-two MS patients were randomly assigned into two groups: an exercise group (EG) that performed a 12-week RTP for the knee extensors muscles; and a control group (CG), that did not perform any specific training. Knee extension maximal voluntary isometric contraction (MVIC), muscle power and muscle endurance were evaluated before and after the RTP, as well as 12 weeks after training completion. A strain gauge was used to measure the maximal voluntary isometric contraction and muscle power was assessed with a linear encoder. Muscle endurance was interpreted as the number of repetitions that a patient could perform in a single set of knee extension exercise.
The EG increased MVIC and muscle power after the training period, although the training did not affect muscle endurance. After 12 weeks of detraining, MVIC returned to pre-training values but muscle power was still greater than pre-training values in the EG. The CG did not present any change in the variables measured during the intervention.
A 12-week RTP improved MVIC and muscle power in MS patients. Additionally, 12 weeks of detraining blunted strength training adaptations in MS patients, although muscle power training adaptations were still evident after the detraining period.
尽管已经描述了多发性硬化症（MS）患者的抗阻训练适应性，但该人群的废用训练反应在很大程度上尚不清楚。
本研究旨在评估为期12周的废用训练期对先前进行了12周抗阻训练计划（RTP）的多发性硬化症（MS）患者的肌肉力量（等长和耐力）及肌肉功率的影响。
42名MS患者被随机分为两组：运动组（EG），对其膝伸肌进行为期12周的RTP；对照组（CG），不进行任何特定训练。在RTP前后以及训练完成后12周评估膝伸展最大自主等长收缩（MVIC）、肌肉功率和肌肉耐力。使用应变仪测量最大自主等长收缩，并用线性编码器评估肌肉功率。肌肉耐力被解释为患者在一组膝伸展运动中能够完成的重复次数。
训练期后EG的MVIC和肌肉功率增加，尽管训练未影响肌肉耐力。废用训练12周后，EG的MVIC恢复到训练前值，但肌肉功率仍高于训练前值。CG在干预期间测量的变量未出现任何变化。
为期12周的RTP改善了MS患者的MVIC和肌肉功率。此外，12周的废用训练减弱了MS患者的力量训练适应性，尽管在废用训练期后肌肉功率训练适应性仍然明显。
