This study was designed to test the tenability of the following hypothesis: that body weight and displacement are factors to consider when prescribing exercise or assessing physical fitness status. Work output was calculated for each subject on four exercises (situp, pullup, pushup, and vertical jump). There was a significant correlation between maximum repetitions and work output for the pushup, pullup, and situp exercises. These findings, however, did not support the above-stated hypothesis. (PB)