Shoulder Key Exercises Effect on Isometric Torque of Glenohumeral Joint Movements in Healthy Young Females

This study was aimed to indicate the effect of shoulder key exercises on isometric torque of glenohumeral joint movements. In this randomized clinical trial study,36 healthy females with no history of shoulder injury were selected by randomized method. Subjects were assigned randomly to control and experimental group. Experimental group performed shoulder key exercises, using Delorm method, three times a week for six weeks, and control group performed no exercise. The isometric torque of shoulder movements were measured with Dynatorqe device in the specific positions related to each movement before and after six weeks exercise in both groups. Subjects performed three set of maximum voluntary isometric contraction for each movement in the specific positions of tests. Finally, the mean of three maximum voluntary isometric contractions is accounted as a peak torque. Data were analyzed by Kolmogroff-Smirnoff, Paired T test and Independent T test. There were significant differences in movement isometric torque of experimental group between before and after intervention (P<0.001), but there was no significant difference in control group (P>0.05). Also, there was no significant difference between two groups before intervention (P>0.05), but after exercises, differences of two groups were significant in all six movements (P<0.001). Shoulder key exercises training leads to an increase in peak torque for all glenohumeral movements and this can be considered as a point in training program for healthy subjects, particularly in those with overhand sports.