The aim of this study was to evaluate the effectiveness of a basketball specific endurance circuit on improving aspects of aerobic capacity of school basketball players. Thirty male high school aged basketball players volunteered to participate in this study. These subjects were classified into two groups namely experimental and control group. The experiment group underwent 6 weeks 2 sessions per week of basketball specific endurance training this war carried out on an outdoor courts. This training was carried out during the competitive phase of the high school basketball season. Pre and post aerobic capacity was measured on the field. There was a statistical significance from pre to post testing in the experimental group (p < 0.005) and no statistical significance on control (p > 0.05) group. The basketball specific endurance circuit showed modest effect in improving aerobic fitness during the competitive season.