Effects of unilateral electromyostimulation superimposed on voluntary training on strength and cross-sectional area
| Autor: | Zachary Crowley, Lyndon O Brooks, Shi Zhou, Pedro Bezerra, Andrew Hooper |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
medicine.medical_specialty
Knee extensors Physiology business.industry Quadriceps muscle Lower limb Muscle hypertrophy Cross education body regions Cellular and Molecular Neuroscience Voluntary contraction Physiology (medical) Internal medicine Physical therapy medicine Cardiology Neurology (clinical) medicine.symptom business human activities Muscle contraction |
| Zdroj: | Muscle & Nerve. 40:430-437 |
| ISSN: | 0148-639X |
| DOI: | 10.1002/mus.21329 |
| Popis: | In this study we investigate the effects of unilateral voluntary contraction (VC) and electromyostimulation superimposed on VC (EV) training on maximal voluntary (MVC) force and cross-sectional area (CSA), as assessed by magnetic resonance imaging of knee extensors. Thirty young men were randomly assigned to either a control group (CG), VC group (VG), or EV group (EVG). The VG and EVG trained the right leg isometrically three sessions per week for 6 weeks. After training, MVC increased in the right leg in the VG and in both legs in the EVG, and EVG was significantly different from CG (all P < 0.01). Increased CSA was found only in the right leg in the VG and EVG (P < 0.01), and correlated with improvements of MVC (r = 0.49, P = 0.01). It appeared that the EV training was equally effective as VC at increasing MVC and CSA, while having a greater cross-education effect. Increased strength without muscle hypertrophy in the unexercised leg of the EVG indicated that neural adaptation was responsible for the cross-education effect. |
| Databáze: | OpenAIRE |
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