Background : The hamstring muscle a lower limb muscle that has shortened tendency. Shortening hamstring muscle, that called hamstring tightness, is associated with decreased extensibility of the hamstring muscles and pelvic tilt angle. Static stretching exercise is one of stretching exercise methods used to increase hamstring muscle length. Purpose : The purpose of this study was to determine the effect of static stretching exercise on hamstring muscle extensibility and pelvic tilt angle in hamstring tightness conditions. Material/Methods : Quasi experimental pre and post test control group design. The subjects of this study were 28 male students, who were divided into 2 groups. The treatment group and control group both consisted of 14 people. the hamstring muscle extensibility will be measured by examining active knee extension (AKE) and measuring the pelvic tilt angle, which will be evaluated in four weeks in both groups. Result : Static stretching exercise had a significant effect on increasing the extensibility of hamstring muscles (p < 0.05) when compared to the control group. Meanwhile, static stretching exercise does not have a significant effect on the pelvic tilt angle (p > 0.05) as well as the control group. Furthermore, there is no correlation between the value of hamstring muscle extensibility and pelvic tilt angle after the intervention (p > 0.05).

hamstring tightness

pelvic tilt angle

hamstring muscle extensibility

static stretching