Efektifitas Proprioceptive Neuromuscular Facilitation (PNF) Contract Relax Terhadap Fleksibilitas Otot Hamstring

Flexibility can be defined as the ability of a joint and muscle, as well as the surrounding joints to move freely and comfortably in the maximum movement space expected. Factors that can affect the flexibility of muscles become disturbed, one of which is muscle shortening (muscle tightness). Muscle tightness is a description of the limitations of motion resulting from shortening of the muscles. To overcome the problem of muscle tightness above can use a special technique that is the proprioceptive neuromuscular facilitation (PNF) contract relax method. The purpose of administering contract relax stretching is to lengthen the soft tis-sue structure such as muscles, fascia, tendons and ligaments so that it can cause an increase in LGS and decrease pain due to muscle shortening. The purpose of this study is to find out the effectiveness of the Proprioceptive Neuromuscular Facilitation (PNF) contract relaxes the flexibility of the hamstring muscle. This type of research is Quasi Experimental Design with research design in the form of Pretest-Posttest With Control Group Design. The sampling technique used is the Purposive Sampling technique. The number of samples is 30 people. The results of the influence test in the treatment group and the control group obtained p-value 0.001. while the difference in influence test between the two groups obtained a p-value of 0.001, which means that there are differences in influence between the treatment group and the control group. Conclusion: giving contract relax stretching exercises can have a significant influence on increasing the flexibility of hamstring muscle