The purpose of the study was to ascertain the influence of height on cardiovascular efficiency computed using Harvard step test. This study was conducted with amity students whose height was more than 6 feet & also those whose height was 5 feet 6 inches and less, were classified into two separate groups. 10 subjects from each group were taken. There after the resting heart rate (RHR) of all the subjects were recorded. To know the influence of height on cardiovascular The Harvard Step Test is designed. Means of both the tall height and short height groups, Standard deviation of both the tall height and short height groups and t-ratio was computed and the level of significant chosen was 0.05. It is clearly evident that the performance of the tall group is significantly better than the short group in cardio vascular efficiency index and 3 it can be inferred that the mean angles at knee in respect of the subjects belonging to the tall height group are higher than that of the short height group. The level of significant was fixed at 0.05. Therefore the height of the bench in Harvard Step Test should be according to the height of the subject.