ORIGINAL INVESTIGATION: PDF OnlyTaimela S.; Kujala, U. M.; Dahlström, S.; Koskinen, S.Clinical Journal of Sport Medicine: April 1992 - p 105-108 Buy Abstract This study analyzed risk factors for stress fractures. There were two specific aims. The first part of the study analyzed the frequency of stress fractures in different activities during two different training periods. Although both programs entailed the same number of hours of physical exercise, running was replaced by cross-country skiing in the other. Two sets of conscripts consisting of 823 men and 876 men, respectively, were followed at the beginning of their compulsory military service. A seven-fold decrease in stress fractures occurred when running was replaced by skiing. The second part of the study analyzed various individual characteristics that might be predictive of stress fracture. The 823 recruits of the first group were observed for a 20-week period. Contrary to our expectations, large body size, slow psychomotor reaction time parameters, defects in vision, low-grade mental ability parameters, or specific MMPI personality traits were not predictive of stress fracture. We conclude that the risk of lower limb stress fractures may be reduced if running is replaced by cross-country skiing during physical training programs. © Lippincott-Raven Publishers.