| Superimposed electrical stimulation decreases maximal grip force. | |
| | |
MedLine Citation:
|
PMID: 20585292 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
AIM: The purpose of this study was to assess maximal grip force in two conditions of voluntary muscular contraction (MVC) and electrical stimulation superimposed on voluntary muscular contraction (SES) to better understand mechanisms and effectiveness of electrical stimulation of the hand. There is conflicting evidence regarding the effectiveness of electrical stimulation superimposed on voluntary muscular contraction on improving maximal force. Increased knowledge of the physiologic and mechanical effects of electrical stimulation applied during voluntary muscular contraction can lead to refinement of its clinical application. METHODS: Twenty subjects (36+/-13 years; 17 males and 3 females) participated in this study. All subjects were undergoing physical therapy within a hand rehabilitation center. They were instructed to randomly perform three grip determinations in both voluntary muscular contraction and superimposed electrical stimulation conditions to elicit maximal grip force of the unaffected hand. Force was assessed using a handheld dynamometer. Subjective force and contraction were assessed just after sessions as well as pain and discomfort using a visual analogue scale. RESULTS: The mean force values were 22+/-7 kg and 30+/-1 kg for the superimposed electrical stimulation and voluntary muscular contraction conditions, respectively. Analyses of the force measures showed that force was weaker in the superimposed electrical stimulation condition (P<0.001). Patients rated their pain and discomfort at 0+/-0 mm and 4+/-2.9 mm, respectively. CONCLUSION: Maximal grip force is reduced when electrical stimulation is superimposed to voluntary muscular contraction. This result could be explained by unbalanced muscular synergies at the hand due to SES, confirming these synergies as essential to produce maximal grip force. |
| | |
Authors:
|
M Boisgontier; N Vuillerme; M D Iversen |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: The Journal of sports medicine and physical fitness Volume: 50 ISSN: 0022-4707 ISO Abbreviation: J Sports Med Phys Fitness Publication Date: 2010 Jun |
Date Detail:
|
Created Date: 2010-06-29 Completed Date: 2010-12-23 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0376337 Medline TA: J Sports Med Phys Fitness Country: Italy |
Other Details:
|
Languages: eng Pagination: 152-8 Citation Subset: IM |
Affiliation:
|
TIMC-IMAG Laboratory, UMR-UJF-CNRS 5525, La Tronche, France. matthieu.boisgontier@imag.fr |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Electric Stimulation* Female Hand Strength / physiology* Humans Male Muscle Contraction / physiology Muscle Strength Dynamometer Pain Measurement |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Ankle-joint mobility and standing squat posture in elite junior cross-country skiers. A pilot study.
Next Document: The effects of indoor cycling training in sedentary overweight women.