In 1991-1992, a pelvic stress fracture incidence of 11.2% was recorded in a cohort of 143 female Australian Army recruits:
An incidence of 0.1% was recorded in a cohort of male recruits trained in the 1992-1993 year using a nearly identical program. A number of preventive strategies were instituted in an attempt to reduce the high incidence of injury in female recruits. Route march speed was reduced from 7.5 to 5 km/h, running occurred on softer surfaces, individual step length was promoted instead of marching in step, march and run formations were more widely spaced, and interval-running training replaced traditional middle-distance runs. Pelvic stress fracture incidence decreased significantly to 0.6% in an immediately subsequent cohort of 161 female recruits (chi 2 = 15.12 for 1 df; p < 0.001). It is likely that the preventive strategies reduced bone strain by reducing the frequency and forces of impact during the training period.
(Hat tip to Arctotherium.)
So, with all those accommodations, women were still six times more likely to have a pelvic fracture than men with no accommodations.
Women can’t be soldiers.