The purpose of the study was to find out the effect of slow continuous run, speed continuous run and extensive interval run training on speed performance of post adolescence boys. For this study 80(Eighty) healthy untrained subjects were selected randomly and divided into four groups. Group 'A' underwent slow continuous running (SLCRG) Group 'B' underwent the speed of continuous running (SPCRG), Group 'C' underwent extensive interval training (EIRTG). Group 'D' acted the control group (CG) did not undergoes any special training program in addition to their regular program. Training was provided for three days a week in the morning and evening only. The training was for a period of 12 weeks. The speed performance was measured in a standard track. Prior to and after the end of practice period all the subjects were tested on 50 meter dash performance. The data for training periods (pre-test) were obtained before and after the training period of 12 weeks (post-test). The obtained ‘F’ value of 2.98 for post test scores on speed, which was greater than the table value of 2.72 for significance with df 3 and 76 at 0.05 level of confidence. The result of the study reveals that there was significant improvement in speed continuous running group and extensive interval run training group compared with the other groups significantly.
