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Abstract
Shoulder movement impairment is a commonly reported consequence of surgery for breast cancer. The purpose of this study was to investigate the differences in the isokinetic muscle forces of scapular protractors and retractors and shoulder flexors, extensors, abductors, and adductors between affected and non - affected sides in patients with post unilateral mastectomy. One - hundred and fifty female patients with unilateral post mastectomy assigned into three equal groups. group (A) consisted of 50 patients with age ranging from (35 - 45), group (B) consisted of 50 patients with age ranging from (46 - 55), and group (C) consisted of 50 patients with age ranging from (56 - 75). isokinetic peak torque of scapular protractors and retractors and shoulder flexors, extensors, abductors, and adductors were measured at angular velocity 90 degree/sec for all patients at different age groups. Mixed design MANOVA revealed that there was a significant reduction of isokinetic peak torque of scapular protractors and retractors and shoulder flexors, extensors, abductors, and adductors at affected side compared to non affected side for group A and B (P < 0.05). While there was significant reduction of isokinetic peak torque of shoulder abductors and adductors at affected side compared to non affected side for group C and there was no significant difference of isokinetic peak torque of scapular protractors and retractors and shoulder flexors, extensors between affected and non affected at group C