Effect of foam roller and static stretch on hamstring flexibility

Objective: The primary purpose of this study is to investigate the immediate effect of hamstring flexibility. Method: A pre/post- test design was used for this study. 75 participants were recruited from 6 different organizations. There were 3 groups (foam rolling, static stretch and relaxation). Each participant received the intervention between the pretest and posttest. Results: There was no significant difference in time (pretest and posttest) * interventions (F2,,73 = 1.895, P = .158). The within-subject ANOVA, all 3 interventions can significantly improve hamstring flexibility (F1,73 = 83.714, p = .000). From the between-subject ANOVA, there was no significant different improvement between 3 interventions (F1, 73 = 83.714, p = .075). Conclusion: Applying foam rolling with RumblerRoller, static stretching and relaxation on hamstring for 30 seconds had a significant improvement on flexibility.