Effect of artificial gravity and exercise load on cardiovascular deconditioning, myatrophy, and osteoporosis in young men before and after bedrest.

Abstract

We examined the effect of countermeasure, including artificial gravity and ergometric exercise, in 10 young healthy men before and after 20 days of bedrest. We loaded 20 min of hypergravity with low intensity exercise and 20 min of low gravity of 0.3 G with high intensity exercise (80% of V_O2max) for 10 days. The load has been proved to be effective on myatrophy and physical fitness, however, the effects on orthostasis and osteoporosis were attenuated. Development for the protocol for all systems, cardiovascular, skeletal muscle, and bone metabolism shall be projected in the future stusies. [Jpn J Physiol 54 Suppl:S244 (2004)]