Hamstring flexibility has been a matter of concern for all age groups in society. Tight hamstrings are associated with back pain and many other clinical conditions. The reason is that tight hamstrings restricts the hip flexion during forward bending as a result compensatory movements are produced due to which spinal joints have to compensate & produce movement. Apart from low back pain, ergonomically long hours of sitting at work place, is also one of the common causes of tight hamstrings in general population. Methodology: 40 office workers were included in the study. Range of motion at hip joint by SLR test was measured just prior & immediately after the hamstring stretching in chair stretch position. 18­25 years male and female individuals working with minimum 6 hours of sitting job were assigned in to group A; chair stretch and group B; warm up. Results: Group A & Group B showed no significant difference (t=0.884, p=0.05) at the starting of experiment however after stretching was given in group A and control group B was given warm up, a significant difference (t=5.56, p=0.05*) was found between the two groups, as chair stretch group showed more significant improvement in range of motion. Conclusion: The study observed that chair stretch was found to be effective in office workers in increasing hamstring flexibility.

 Keywords: Chair Stretch; Hamstring Muscle; Flexibility.