Journal article
Effects of shoulder muscle fatigue caused by repetitive overhead activities on scapulothoracic and glenohumeral kinematics
Journal of electromyography and kinesiology, v 16(3), pp 224-235
01 Jun 2006
PMID: 16125416
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The purpose of this study was to determine the effects of shoulder muscle fatigue on three dimensional scapulothoracic and glenohumeral kinematics. Twenty healthy subjects participated in this study. Three-dimensional scapulothoracic and glenohumeral kinematics were determined from electromagnetic sensors attached to the scapula, humerus, and thorax. Surface electromyographic (EMG) data were collected from the upper and lower trapezius, serratus anterior, anterior and posterior deltoid, and infraspinatus muscles. Median power frequency (MPF) values were derived from the raw EMG data and were used to indicate the degree of local muscle fatigue. Kinematic and EMG measures were collected prior to and immediately following the performance of a shoulder elevation fatigue protocol. Following the performance of the fatigue protocol subjects demonstrated more upward and external rotation of the scapula, more clavicular retraction, and less humeral external rotation during arm elevation. All muscles with the exception of the lower trapezius showed EMG signs of fatigue, the most notable being the infraspinatus and deltoid muscles. In general, greater scapulothoracic motion and less glenohumeral motion was observed following muscle fatigue. Further studies are needed to determine what effects these changes have on the soft tissues and mechanics of the shoulder complex.
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Details
- Title
- Effects of shoulder muscle fatigue caused by repetitive overhead activities on scapulothoracic and glenohumeral kinematics
- Creators
- D David EbaughPhilip W McClure - Arcadia UniversityAndrew R Karduna - University of Oregon
- Publication Details
- Journal of electromyography and kinesiology, v 16(3), pp 224-235
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physical Therapy (and Rehabilitation Sciences)
- Web of Science ID
- WOS:000237996800002
- Scopus ID
- 2-s2.0-33646188952
- Other Identifier
- 991019169801404721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Neurosciences
- Physiology
- Rehabilitation
- Sport Sciences