Document Detail


Strength response in human femoris muscle during 2 neuromuscular electrical stimulation programs.
MedLine Citation:
PMID:  14743985     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
STUDY DESIGN: Experimental mixed repeated-measures design. OBJECTIVE: To determine the effect of 2 versus 3 neuromuscular electrical stimulation (NMES) training sessions per week on the response to strength training of the quadriceps femoris muscle. BACKGROUND: Many studies have examined the influence of training intensity (percent maximal voluntary isometric contraction [MVIC]) during NMES on the strength response of the quadriceps femoris muscle. However, no study has examined the effects of the number of NMES sessions per week on the change in strength of the quadriceps femoris. METHODS AND MEASURES: Twenty-seven healthy subjects (mean age +/- SD, 23.2 +/- 3.2 years) volunteered for the study and were randomly assigned to 1 of 3 groups; control group (no electrical stimulation); group 2 (NMES 2 times per week); and group 3 (NMES 3 times per week). Groups 2 and 3 received NMES (10 minutes per session) over a 4-week period for a total of 8 and 12 NMES training sessions, respectively. The isometric quadriceps femoris muscle force produced during NMES was monitored during each treatment minute. The MVIC force of the quadriceps femoris was assessed prior to the first week and at the start of weeks 2, 3, and 4 of the 4-week training program, with a final measurement after the fourth week (5 total measurements) for all subjects. RESULTS: Only the mean percent change in quadriceps MVIC before and after the 4 weeks of training with NMES between the control group and group 3 was significantly different (P = .021). CONCLUSIONS: Based on the electrical stimulation parameters and healthy subjects used in this study, NMES caused significant increases in the quadriceps femoris muscle strength when used for 3 training sessions per week for 4 weeks. It is possible that the use of a different electrical stimulation paradigm and/or a different patient population may result in strength gains with 1 or 2 sessions per week.
Authors:
Michael G Parker; Mark J Bennett; Marcus A Hieb; Anthony C Hollar; Amy A Roe
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  The Journal of orthopaedic and sports physical therapy     Volume:  33     ISSN:  0190-6011     ISO Abbreviation:  J Orthop Sports Phys Ther     Publication Date:  2003 Dec 
Date Detail:
Created Date:  2004-01-27     Completed Date:  2004-05-19     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7908150     Medline TA:  J Orthop Sports Phys Ther     Country:  United States    
Other Details:
Languages:  eng     Pagination:  719-26     Citation Subset:  IM    
Affiliation:
Program in Physical Therapy, Division of Human Performance Sciences, University of Mary, Bismarck, ND 58504, USA. mparker@umary.edu
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Electric Stimulation*
Female
Humans
Isometric Contraction / physiology*
Male
Muscle, Skeletal / physiology*
Physical Education and Training / methods*
Thigh

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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