Does physical activity enhance health?

This paper provides the justification of physical activity promotion for health by critically reviewing the recent US Surgeon General's Report. Evidence is summarized of the effects of physical activity on physiological responses, overall mortality, a number of diseases and disabilities, overall functional capacity, and mental health and quality of life. Cumulating evidence suggests that the effects be applicable to both genders and to a wide age range. The adverse effects of physical activity on health are shown to be small and mostly preventable. It is emphasized that substantial health effects can be gained by moderate daily physical activity which does not require high skill level nor specialized equipment or facilities. It is concluded that the health potential of physical activity is substantial due to the high prevalence of inactive lifestyle in the populations, the great number of health conditions being affected by physical activity, and the feasibility and safety of physical activity as a health measure.