The purpose of the present study was to analysis of the changes on speed response to unilateral and bilateral complex training among young athletes.. To achieve the purpose of the study, forty-five young athletes aged between 15 and 18 years were selected as subjects and randomly divided into three equal groups of fifteen each. Group-I underwent unilateral complex training, Group-II underwent bilateral complex training, and Group-III served as the control group. The training programme was conducted for a period of twelve weeks following a two-week familiarization programme. Speed was selected as the dependent variable and assessed before and after the training programme. The collected data were statistically analyzed using paired ‘t’ test and Analysis of Covariance (ANCOVA). The results revealed significant improvements in speed among the experimental groups compared to the control group. The obtained paired ‘t’ values for unilateral complex training and bilateral complex training groups were 18.581 and 5.504 respectively, which were greater than the required table value of 2.20 at 0.05 level of significance. The ANCOVA results also indicated significant differences among the groups, as the obtained adjusted post-test ‘F’ value (18.774) was higher than the required table value of 2.82 at 0.05 level of confidence. Further, Scheffe’s post hoc test confirmed significant mean differences between the groups. The percentage of improvement in speed was 4.48% for the unilateral complex training group and 4.88% for the bilateral complex training group. The study concluded that both unilateral and bilateral complex training significantly improved speed among young athletes. However, bilateral complex training was found to be more effective in improving speed performance.