The backpack run test: A model for a fair and occupationally relevant military fitness test

Our purpose in this investigation was to develop and validate a theoretical model for a backpack run test based on how fast one can run 2 miles while wearing a backpack. Using actual unloaded (no backpack) 2-mile-run test dat a from 59 male service academy cadets, we calculated the average oxygen cos t during the run, the equivalent cost if wearing additional weight, and the corresponding estimated run time with the backpack. The correlations betwe en body weight and loaded (backpack weight = 30 kg) run times (r = 0.55 [p < 0.05] and r = 0.12 [p > 0.05], respectively) demonstrate that the bias ag ainst heavier runners is eliminated with the backpack run. Given that the b ackpack run test requires only standard-issue equipment, demonstrates clear occupational and health-related fitness relevance, predicts no apparent bo dy-size bias, and measures work- and health-related components of fitness, me recommend that the military services consider the present data when deve loping or modifying tests of physical fitness.