1995 Volume 23 Issue 1 Pages 33-37
Effects of a 21-wk exercise training on the mechanical properties and density of bone of the tibia ant the femur were evaluated for 9-wk and 63-wk old wistar 40 male rats. Mechanical tests were conducted for tibial bone. Dynamic stiffness and tan δ were measured with a viscoelastic spectrometer, and a three-point bending test was performed with an Instron-type universal testing machine. Bone mineral content was measured by photon absorptiometry at the middle site of the tibia and the femur. For both young and old bones, the exercise training induced differences in mechanical properties and density. The training effects were considerably different for the young and old bones and greater for the former.