2022, Vol. 9, Issue 6, Part F

Back Ground of the Study: Muscle bulk and endurance plays an important role in matching athletes to appropriate sports. From a functional point of view, quadriceps muscle is an extraordinarily important muscle. Strengthening and toning quadriceps muscle can improve the stability of knee, reduce risk of knee injuries, make everyday movements easier to do and improve athletic performance. The aim of the present study is to find and compare the effectiveness of isotonic exercises and isometric exercises on the endurance and bulk of quadriceps muscle in normal individuals.

Methodology: The sample consisting of 30 subjects, were divided randomly into two groups. Group I received isotonic exercises, group II received isometric exercises, all the subjects underwent an initial measurement of quadriceps muscle bulk and endurance. After the initial measurement, the first group was taught isotonic strengthening exercises and the second group underwent isometric resisted exercise. The strengthening program was for a period of 6 weeks for both the groups after which post exercise measurements of thigh circumference and quadriceps endurance were measured by the pre-exercise method.

Conclusion: Both isotonic and isometric exercise program showed significant increase in endurance and muscle bulk. The isotonic exercise group showed better result in improving endurance as compared to isometric exercise. No significant difference in bulk between the two groups.