Latihan Contract Relax Stretching dapat Meningkatkan Fleksibilitas Otot Hamstring

Background: Flexibility is an important support in performing comfortable movements and is one of the components that determine human motion activity. For non-athletes the flexibility can be to support the activities of everyday activities while for sportsmen such as gymnastics, scenic jumps, judo, some athletic numbers, fencing, wrestling and other sports games flexibility is indispensable. Flexibility is a necessary prerequisite for displaying a skill that requires extensive joint motion and facilitates quick and agile movements. Objective: To determine the effect of Contract Relax Stretching exercise to increase the flexibility of Hamstring muscle. Research Methods: The design of this study was an experiment with Quasy Experimental type. The design of this study used pre test and post test and control group involving intervention groups. Sample of 20 people. The study was divided into two groups of 10 groups each. The treatment group was given Contract Relax Stretching exercises and the control group was given Active Stretching exercises. Result: The data obtained from normality test distributed because p> 0,05 then influence test that used is paired sample t-test with result of influence test on treatment group p value = 0.000 and control group p value = 0,000, while test the difference of Contract Relax Stretching and Active Stretching effect using independent test sample t-test result p = 0,000. Conclusion: Based on the data, it can be concluded that Contract Relax Stretching and Active Stretching exercises have an effect on increasing flexibility of hamstring muscle