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It has been hypothesized that the fibers of the infraspinatus and subscapularis superior to the glenohumeral axis of rotation contribute directly to arm elevation.
To test this hypothesis by assessing the impact of 5 weeks of concentric isokinetic humeral-rotator training in a modified neutral position on scapular-plane arm-elevation peak torque.
Prospective, pretest/posttest with control group.
24 female and 6 male noninjured college students (N = 30).
Scapular-plane-elevation peak torque at 60, 180, and 300°/s.
Repeated-measures ANOVA indicated no difference in peak torque between groups at any of the angular velocities tested (P < .05)
5 weeks of concentric isokinetic humeral-rotator training did not significantly increase scapular-plane-elevation peak torque.
Durall is with the Physical Therapy Program at Creighton University, Omaha, NE 68178. He was with the Physical Therapy Program at the University of Wisconsin-LaCrosse and Gundersen-Lutheran Sports Medicine, Onalaska, Wisc, at the time this study was conducted. Kernozek, Davies, Fater, and Straker are with the Physical Therapy Program at the University of Wisconsin-LaCrosse. Davies is also with Gundersen-Lutheran Sports Medicine, Onalaska. Gibson is with the Dept of Sport and Exercise Science and the Athletic Training Program at the University of Wisconsin-LaCrosse. Gibson and Fater are also with Gundersen-Lutheran Medical Center, and Straker, with Gundersen-Lutheran Sports Medicine, LaCrosse.