Abnormal isokinetic time-to-peak torque of the medial rotators of the shoulder in subjects with impingement syndrome.
The time-to-peak torque (TPT) and the peak torque ratio of the lateral to medial rotators (LR/MR) during isokinetic lateral and medial rotation of the shoulder were evaluated in patients with shoulder impingement and in healthy subjects. Fifteen patients with shoulder impingement on the dominant side and 9 healthy subjects were evaluated. TPT and LR/MR were measured bilaterally during isokinetic concentric lateral and medial rotation at 60 degrees/s and 180 degrees/s. The impingement group showed a bilateral decrease in the TPT during medial rotation for both 60 degrees/s and 180 degrees/s. No differences were found in the LR/MR between the groups. It is proposed that decreased (TPT) of the medial rotators can be used as a tool for early detection of shoulder impingement. Notably, the decreased time-to-peak torque of the medial rotators may occur before the alteration in the peak torque ratio.
Mattiello-Rosa
Stela M
SM
Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil. stela@power.ufscar.br
Camargo
Paula R
PR
Santos
Alexandre A S
AA
Pádua
Michelle
M
Reiff
Rodrigo B M
RB
Salvini
Tania F
TF
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000503:physiopathology; D016059:Range of Motion, Articular; D017006:Rotator Cuff / Q000503:physiopathology*; D019534:Shoulder Impingement Syndrome / Q000503:physiopathology*; D013997:Time Factors; D019415:Torque