Neuromuscular adaptations to electrostimulation resistance training

被引:65
|
作者
Maffiuletti, NA
Zory, R
Miotti, D
Pellegrino, MA
Jubeau, M
Bottinelli, R
机构
[1] Schulthess Klin, CH-8008 Zurich, Switzerland
[2] Univ Burgundy, INSERM, ERM 207, Dijon, France
[3] Univ Savoy, STAPS Dept, UFR CISM, Chambery, France
[4] Fdn Salvatore Maugeri, Pavia, Italy
[5] Univ Pavia, Human Physiol Unit, I-27100 Pavia, Italy
关键词
quadriceps femoris; strength; activation; myosin heavy chain; contractile properties;
D O I
10.1097/01.phm.0000197570.03343.18
中图分类号
R49 [康复医学];
学科分类号
100215 ;
摘要
A combination of in vivo and in vitro analyses was performed to investigate muscular and neural adaptations of the weaker (nondominant) quadriceps femoris muscle of one healthy individual to short-term electrostimulation resistance training. The increase in maximal voluntary strength (+ 12%) was accompanied by neural (cross-education effect and increased muscle activation) and muscle adaptations (impairment of whole-muscle contractile properties). Significant changes in myosin heavy chain (MHC) isoforms relative content (+22% for MHC-2A and -28% for MHC-2X), single-fiber cross-sectional area (+27% for type 1 and +6% for type 2A muscle fibers), and specific tension of type 1 (+67%) but not type 2A fibers were also observed after training. Plastic changes in neural control confirm the possible involvement of both spinal and supraspinal structures to electrically evoked contractions. Changes at the single muscle fiber level induced by electrostimulation resistance training were significant and preferentially affected slow, type 1 fibers.
引用
收藏
页码:167 / 175
页数:9
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