Effect of thoracic expansion restriction on scapulothoracic and glenohumeral joint motion during shoulder external rotation.
Scapulothoracic joint
glenohumeral joint
restriction of thoracic expansion
shoulder external rotation
Journal
Journal of back and musculoskeletal rehabilitation
ISSN: 1878-6324
Titre abrégé: J Back Musculoskelet Rehabil
Pays: Netherlands
ID NLM: 9201340
Informations de publication
Date de publication:
2022
2022
Historique:
pubmed:
21
6
2022
medline:
16
11
2022
entrez:
20
6
2022
Statut:
ppublish
Résumé
Shoulder external rotation in the throwing motion involves movement of the scapulothoracic and glenohumeral joints, thoracic spine, and the thorax. Restriction of thoracic expansion may decrease scapulothoracic joint motion and compensate by excessive glenohumeral joint motion. However, it is unclear how restricting the expansion of the thorax alters shoulder motion. To elucidate changes in scapulothoracic and glenohumeral joint movements caused by restricted thoracic expansion. Kinematic data were obtained using an electromagnetic tracking device (Liberty; Polhemus), from 18 male participants, during shoulder external rotation in the sitting position with and without restriction of thoracic expansion. The displacements from the start position to the maximum external rotation position were compared, and Pearson's correlation coefficient was calculated. A significant difference was observed in the scapulothoracic posterior tilt angle (P< 0.01) and glenohumeral external rotation angle (P< 0.01). A significant positive correlation existed between scapulothoracic posterior tilt and glenohumeral external rotation (P< 0.05) with and without restriction. Restriction of thoracic expansion decreased scapulothoracic motion and increased glenohumeral motion. Thus, a decrease in thoracic expansion may change scapulothoracic and glenohumeral movements, which may be a risk factor for throwing injuries.
Sections du résumé
BACKGROUND
BACKGROUND
Shoulder external rotation in the throwing motion involves movement of the scapulothoracic and glenohumeral joints, thoracic spine, and the thorax. Restriction of thoracic expansion may decrease scapulothoracic joint motion and compensate by excessive glenohumeral joint motion. However, it is unclear how restricting the expansion of the thorax alters shoulder motion.
OBJECTIVE
OBJECTIVE
To elucidate changes in scapulothoracic and glenohumeral joint movements caused by restricted thoracic expansion.
METHODS
METHODS
Kinematic data were obtained using an electromagnetic tracking device (Liberty; Polhemus), from 18 male participants, during shoulder external rotation in the sitting position with and without restriction of thoracic expansion. The displacements from the start position to the maximum external rotation position were compared, and Pearson's correlation coefficient was calculated.
RESULTS
RESULTS
A significant difference was observed in the scapulothoracic posterior tilt angle (P< 0.01) and glenohumeral external rotation angle (P< 0.01). A significant positive correlation existed between scapulothoracic posterior tilt and glenohumeral external rotation (P< 0.05) with and without restriction.
CONCLUSIONS
CONCLUSIONS
Restriction of thoracic expansion decreased scapulothoracic motion and increased glenohumeral motion. Thus, a decrease in thoracic expansion may change scapulothoracic and glenohumeral movements, which may be a risk factor for throwing injuries.
Identifiants
pubmed: 35723089
pii: BMR220006
doi: 10.3233/BMR-220006
pmc: PMC9697060
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
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