Abstract
Various physiological functions decline with age at various speeds. The decline is significantly different in individuals. Some physiological functions that are well maintained under the resting condition, often can not adapt with severe. changes in individual's environment or hard exercise in the aged. Individual's numerous physiological functions act with intimate cooperation among them. It is necessary for the aged to accept the age-related decline of those functions. Otherwise, the aged will receive those declines as the stressors, and consequently the age-related decline of physiological function will be accelerated. Therefore, it is necessary for the aged to recognize precise mechanisms of their age-related physiological function, and to respond properly to these declines.
