Effects of exercise on bone morphology: Vascular channels studied in the rat tibia

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Abstract
14 male rats were divided into exercise and control groups to examine the effect of a 1-month exercise program on the vascular morphology of the tibial diaphysis. Following the exercise program the number of haversian canals per mm2 increased in the middle third of the cortex, but not in the outer or inner zone. No change was observed in the number of non-haversian canals. The size of the nonhaversian canals increased following the training program, which was not evident in the haversian canals.