Pengaruh Metode Contract Relax Dan Active Isolated Strecthing Terhadap Peningkatan Fleksibilitas Hamstring Pada Kondisi Hamstring Tightness

Background: Tightness hamstring is a muscle condition that shortens elasticity and flexibility due to pathological factors (trauma), infection, etc.). Research Objectives: This study aims to determine the difference of Contract Relax and Active Isolated stretching effect on hamstring flexibility in hamstring tightness condition. Research Methods: This research includes Quasi Experiment research called pre- test and post-test design with two group design. By comparing between two treatments, one Contract Relax Stretching group and second group Active Isolated Stretching, so it can be compiled a research design as recording to the respondent taken as sample is measured flexibility in hamstring tightness patient. This research was conducted in Mendungan Surakarta on UMS Student who was in Kos Animasi and Kos Ardian for 1 month, with research sample amounted to 28 people. Result of research: Contrax Relax Stretching effect test data obtained Z value of -3.299 with significance value of 0.001, this means significant value <0,05, whereas result of Active Isolated Stretching effect test obtained Z value equal to -3,301 with significance value equal to 0,001, this means significant value <0.05, then the test results using the Mann-Whitney Test shows the flexibility of Contrax Relax Stretching with a significant value of 0.002 and Active Isolated Stretching flexibility with a significance value of 0.000, thus the result