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Τρίτη 8 Φεβρουαρίου 2011

MEDICINE: PHYSICAL ACTIVITY AND PUBLIC HEALTH


Primary Recommendation:



To promote and maintain health, all healthy adults aged 18 to 65 yr need moderate-intensity aerobic (endurance) physical activity for a minimum of 30 min on five days each week or vigorous-intensity aerobic physical activity for a minimum of 20 min on three days each week.


Combinations of moderate- and vigorous-intensity activity can be performed to meet this recommendation.  For example, a person can meet the recommendation by walking briskly for 30 min twice during the week and then jogging for 20 min on two other days.

Moderate-intensity aerobic activity, which is generally equivalent to a brisk walk and noticeably accelerates the heart rate, can be
accumulated toward the 30-min minimum by performing bouts each lasting 10 or more minutes.  Vigorous-intensity activity is
exemplified by jogging, and causes rapid breathing and a substantial increase in heart rate. In addition, every adult should perform activities that maintain or increase muscular strength and endurance a minimum of two days each week.  Because of the dose-response relation between physical activity and health, persons who wish to further improve their personal fitness, reduce their risk for chronic diseases and disabilities or prevent unhealthy weight gain may benefit by exceeding the minimum recommended amounts of physical activity

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