Background: Self myofascial release (SMR) via a tennis ball to the plantar aspect of the foot is widely used and advocated to increase flexibility in badminton players, along the posterior muscles of a proposed “anatomy train”. The main focus of our study to improve hamstring flexibility and prevent hamstring strain in badminton players. Aim: To study the immediate effect of self myofascial release on the plantar aspect of feet to increase hamstring flexibility in badminton players. Material and Method: This cross- sectional experimental study had 150 recreational badminton players. Badminton players both male and female with age group of 18 to 30 yrs of age, playing at least twice in week and having hamstring tightness according sit and reach test score were included. Whereas recent injury, stiffness in lumbar spine were excluded. Material required were sit and reach box, tennis ball, chair. Result: After self myofascial release there was significant increase in the sit and reach test score as measure hamstring flexibility in badminton players. Conclusion: On the basis of statistical analysis we conclude that single intervention of self myofascial release is effective in improving score of sit and reach test as flexibility of outcome measure. So, we conclude that self myofascial release might be effective treatment to reduce tightness of hamstring muscle in badminton players and improve their performance.