Abstract:
CONTEXT:There are contradictory data on optimal muscle-activation strategies for restoring shoulder stability. Further investigation of neuromuscular-control strategies for glenohumeral-joint stability will guide clinicians in decisions regarding appropriate rehabilitation exercises. OBJECTIVES:To determine whether subscapularis, infraspinatus, and teres minor (anteroposterior force couple) muscle activation differ between 4 shoulder exercises and describe coactivation ratios and individual muscle-recruitment characteristics of rotator-cuff muscles throughout each shoulder exercise. DESIGN:Crossover. SETTING:Laboratory. PARTICIPANTS:healthy, physically active men, age 20.55 ± 2.0 y. INTERVENTIONS:4 rehabilitation exercises: pitchback, PNF D2 pattern with tubing, push-up plus, and slide board. MAIN OUTCOMES MEASURES:Mean coactivation level, coactivation-ratio patterns, and level (area) of muscle-activation patterns of the subscapularis, infraspinatus, and teres minor throughout each exercise. RESULTS:Coactivation levels varied throughout each exercise. Subscapularis activity was consistently higher than that of the infraspinatus and teres minor combined at the start of each exercise and in end ranges of motion. Individual muscle-recruitment levels in the subscapularis were also different between exercises. CONCLUSION:Results provide descriptive data for determining normative coactivation-ratio values for muscle recruitment for the functional exercises studied. Differences in subscapularis activation suggest a reliance to resist anteriorly directed forces.
journal_name
J Sport Rehabiljournal_title
Journal of sport rehabilitationauthors
Swanik KA,Huxel Bliven K,Swanik CBdoi
10.1123/jsr.20.4.471subject
Has Abstractpub_date
2011-11-01 00:00:00pages
471-86issue
4eissn
1056-6716issn
1543-3072journal_volume
20pub_type
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journal_title:Journal of sport rehabilitation
pub_type: 杂志文章
doi:10.1123/jsr.19.4.411
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journal_title:Journal of sport rehabilitation
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pub_type: 杂志文章,随机对照试验
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更新日期:2010-05-01 00:00:00
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pub_type: 杂志文章,评审
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