Methods: Isokinetic peak force was evaluated during protraction and retraction of the shoulder girdle, with simultaneous recording of electromyographic activity of the three trapezius muscles and the serratus anterior muscle, in 19 overhead athletes with impingement symptoms.
Results: Paired t tests showed significantly lower peak force during isokinetic protraction at high velocity (p,0.05), a significantly lower protraction/retraction ratio (p,0.01), and significantly lower electro- myographic activity in the lower trapezius muscle during isokinetic retraction on the injured side than on the non-injured side (p,0.05).
Conclusion: These results confirm that patients with impingement symptoms show abnormal muscle performance at the scapulothoracic joint.
Methods: Isokinetic peak force was evaluated during protraction and retraction of the shoulder girdle, with simultaneous recording of electromyographic activity of the three trapezius muscles and the serratus anterior muscle, in 19 overhead athletes with impingement symptoms.Results: Paired t tests showed significantly lower peak force during isokinetic protraction at high velocity (p,0.05), a significantly lower protraction/retraction ratio (p,0.01), and significantly lower electro- myographic activity in the lower trapezius muscle during isokinetic retraction on the injured side than on the non-injured side (p,0.05).Conclusion: These results confirm that patients with impingement symptoms show abnormal muscle performance at the scapulothoracic joint.
การแปล กรุณารอสักครู่..
