Abstract:
: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.
journal_name
Am J Phys Med Rehabiljournal_title
American journal of physical medicine & rehabilitationauthors
Maffiuletti NA,Zory R,Miotti D,Pellegrino MA,Jubeau M,Bottinelli Rdoi
10.1097/01.phm.0000197570.03343.18subject
Has Abstractpub_date
2006-02-01 00:00:00pages
167-75issue
2eissn
0894-9115issn
1537-7385pii
00002060-200602000-00011journal_volume
85pub_type
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journal_title:American journal of physical medicine & rehabilitation
pub_type: 杂志文章,随机对照试验
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journal_title:American journal of physical medicine & rehabilitation
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