Scapular kinematics and scapulohumeral rhythm during resisted shoulder abduction--implications for clinical practice.
OBJECTIVE
To offer a three-dimensional description of the scapular kinematics and scapulohumeral rhythm (SHR) in healthy subjects during quasi-static shoulder abduction. To analyze and compare the influence of loaded and unloaded conditions on scapula kinematics and SHR.


METHODS
Eleven subjects were analyzed using videogrammetry and the application of mathematical modelling during quasi-static shoulder abduction positions (intervals of approximately 30 degrees).


METHODS
Scapular kinematic data under unloaded and loaded conditions.


RESULTS
The scapula presented external rotation, upward rotation and posterior tilting during the studied movement. Analyzing the scapulohumeral rhythm, different behaviours were observed in the scapular movement planes. Loading condition increased scapular upward rotation and posterior tilt at 60 degrees and 90 degrees of abduction (p>0.01).


CONCLUSIONS
Analyzed scapular kinematics and scapulohumeral rhythm showed differences between adopted loading conditions. The clinical applications of these findings are discussed.
Forte
Felipe Camargo
FC
Exercise Research Laboratory, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil. ft_felipeforte@hotmail.com
de Castro
Marcelo Peduzzi
MP
de Toledo
Joelly Mahnic
JM
Ribeiro
Daniel Cury
DC
Loss
Jefferson Fagundes
JF
D000328:Adult; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D006811:Humerus / Q000293:injuries*; D008297:Male; D008962:Models, Theoretical; D011187:Posture; D012540:Scapula / Q000293:injuries*; D019534:Shoulder Impingement Syndrome / Q000534:rehabilitation*; D000070599:Shoulder Injuries