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Effects of Artificial Gravity Combined with Moderate Exercise on Aerobic and Anaerobic Powers after 4 d Head-down Bed Rest
Pages: 95-100
Year: Issue:  2
Journal: Space Medicine & Medical Engineering

Keyword:  simulated microgravityhead-down bed restartificial gravityanaerobic powermaximal oxyge consumption;
Abstract: Objective To investigate the effects of 4 d head-down bed rest( HDBR) as simulated microgravity on aerobic power and anaerobic power,and the protective effects of artificial gravity combined with moderate exercise. Methods Twelve healthy male volunteers were randomly divided into the control group( Con,n = 6)and the countermeasure group( CM,n = 6). Subjects in the control group performed 4 d HDBR without any intervention. Subjects in the countermeasure group conducted two sessions of artificial gravity combined with moderate exercise( 2 Gz at feet level,30 min per session) as a countermeasure. Graded exercise test and anaerobic power test were performed before and after HDBR. Results Cumulative exercise stress index,maximal oxygen consumption,anaerobic threshold,and minim anaerobic power decreased while percent of anaerobic power drop increased significantly( P < 0. 05) in the control group after HDBR. However,no significant change was detected in peak anaerobic power,average anaerobic power. No significance was detected in all the above parameters in the countermeasure group. Conclusion It is suggested that exercise capacity reduced after 4 d HDBR. The aerobic power was affected seriously,while the anaerobic power was affected a little.Moderate exercise based on artificial gravity preserved both aerobic power and anaerobic endurance during 4 d HDBR.
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