This study was conducted to examine the effects of isometric exercise with various degrees on the peak torque. The following results were obtained after measuring changes in maximum muscular strength in the participating groups after being submitted to 12 consecutive weeks of isometric exercise. A preliminary test, prior to the 12 weeks of isometric exercise, using the Cybex Humax NormTM (isometric exercise equipment) was also conducted. First, any significant differences were found when measuring the maximum muscular strength in the knees of the participating groups after 12 weeks of isometric exercise. Second, after being subjected to 12 weeks of isometric exercise, it was found that the group assigned to isometric exercise at 40° showed notable improvement in maximum muscular strength in the right knee joint as apposed to the 80° group (p< .05). No significant changes were found in the left knees of both groups. Therefore it can be concluded that an increase in maximum muscular strength in the knee joint as well as a change in the angle of maximum muscular strength manifestation can be achieved after 12 consecutive weeks of isometric exercise. Thus proving that changing the angle of maximum muscular strength manifestation can result in increased performance and also may be implemented in training program development.