The focus on obesity may be somewhat misleading. Impact of physical fitness and body composition on injury risk among active young adults: A study of Army trainees, Jones et al, https://doi.org/10.1016/j.jsams.2017.09.015 "Conclusions: While the most aerobically fit Army trainees experience lower risk of training-related injury, at any given aerobic fitness level those with the lowest BMIs are at highest risk." The realties are that entry poor bone status, entry nutrient deficiencies, post-entry malnutrition, and treatment protocols are significant issues re injuries, re-injuries, attrition, and readiness rates.