Electroacupuncture is Effective in Cardiac Deconditioning Induced by Head-down Bed Rest

Inclusion Criteria: * The subjects were healthy and physically fit but were not athletes.Comprehensive physical, psychological and routine blood chemistry examinations were performed to select qualified subjects for this research.No medication, smoking, alcohol, or caffeinated drinks were allowed during the study. Exclusion Criteria: * skeleton-muscle diseases, visual or acoustic dysfunction, organic and functional diseases of psychiatry and neurology as well as sleep disorders