Journal article
Scapulothoracic and glenohumeral kinematics following an external rotation fatigue protocol
The journal of orthopaedic and sports physical therapy, v 36(8), pp 557-571
01 Aug 2006
PMID: 16915977
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Study Design: Repeated-measures experimental design.
Objective: To determine the effects of shoulder external rotator muscle fatigue on 3-dimensional scapulothoracic and glenohumeral kinematics.
Background: The external rotator muscles of the shoulder are important for normal shoulder function. Impaired performance of these muscles has been observed in subjects with impingement syndrome and it is possible that external rotator muscle fatigue leads to altered kinematics of the shoulder girdle.
Methods and Measures: Twenty subjects without a history of shoulder pathology 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 external rotation fatigue protocol.
Results: After completing the fatigue protocol subjects demonstrated less external rotation of the humerus. Additionally, they had less posterior tilt of the scapula in the beginning phase of arm elevation, and more scapular upward rotation and clavicular retraction in the mid ranges of arm elevation.
Conclusions: Performance of an external rotation fatigue protocol results in altered scapulothoracic and glenohumeral kinematics. Further studies are needed to investigate the effects of external rotator muscle fatigue on scapulothoracic and glenohumeral kinematics in subjects with shoulder pathology.
Metrics
Details
- Title
- Scapulothoracic and glenohumeral kinematics following an external rotation fatigue protocol
- Creators
- D. David EbaughPhilip W. McClureAndrew R. Karduna
- Publication Details
- The journal of orthopaedic and sports physical therapy, v 36(8), pp 557-571
- Publisher
- J O S P T
- Number of pages
- 15
- Grant note
- R03-OH-3869 / NIOSH CDC HHS R03OH003869 / NATIONAL INSTITUTE FOR OCCUPATIONAL SAFETY AND HEALTH; United States Department of Health & Human Services; Centers for Disease Control & Prevention - USA; National Institute for Occupational Safety & Health (NIOSH)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physical Therapy (and Rehabilitation Sciences)
- Web of Science ID
- WOS:000239471200003
- Scopus ID
- 2-s2.0-33746696026
- Other Identifier
- 991019276220504721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Orthopedics
- Rehabilitation
- Sport Sciences