Lower vertebral bone density in male long distance runners

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Abstract
Ne and mid-tibia using dual photon absorptiometry and at the mid-radius using single photon absorptiometry. Runners (mean weekly training 92.2 ± 6.3 km) had significantly lower (P< 0.05) vertebral bone mineral density (1.12 + 0.03 g-cm-2) than nonrunners(1.24 ± 0.04 g-cm-2). Tibial and radial bone mineral density did not differ between the groups. Daily calcium intake for runners (1,373 ± 486 mg) and nonrunners (1,267 ±236 mg) exceeded the RDA. The results of this study suggest that long distance running may lead to decreased vertebral bone mineral density. The hormonal changes that occur with endurance training may contribute to this decrease. ©1989The American College of Sports Medicine...

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