Effects of Two Isometric Routines on Strength, Size, and Endurance in Exercised and Nonexercised Arms

Abstract

Abstract In essence, this study was directed toward three specific concerns: (a) comparative effects of two isometric exercise patterns relative to static strength, muscular endurance, and size; (b) cross-education effect of two isometric routines; and (c) specificity of change in strength and muscular endurance as noted by comparison of measures taken at the exercise position and a second position. One pattern of exercise consisted of 3 6-second bouts, whereas the second involved 20 6-second bouts. The exercise consisted of elbow flexion from 170 degree angle, and was performed on alternate days, 3 times weekly for 6 weeks. Statistical analysis revealed no difference among the one control and two exercise groups (representing a total N of 29), while t-ratios of change within each exercise group showed some significant differences. Evidence suggests that the protracted pattern was more beneficial than the short routine in fostering development of muscle strength, endurance, and size. However, further inve...