Regular physical activity will help protect from the following problems:

Heart Disease: Daily physical activity can help
prevent heart disease and stroke by strengthening
your heart muscle, lowering your blood pressure,
and improving blood flow, and increasing your
heart's working capacity.

Obesity: Physical activity helps to reduce body
fat by building or preserving muscle mass and
improving the body's ability to use calories.

Back Pain: Regular exercise helps to prevent
back pain by increasing muscle strength and
endurance and improving flexibility and posture.

High Blood Pressure: Regular physical activity
can reduce blood pressure and also reduces
body fatness, which is associated with high
blood pressure.

Osteoporosis: Regular weight-bearing
exercise promotes bone formation and
may prevent many forms of bone loss
associated with aging.

Noninsulin-Dependent Diabetes: By reducing body
fatness, physical activity can help to prevent and
control this type of diabetes.

Studies on the psychological effects of exercise have found that regular
physical activity can improve your mood and the way you feel about yourself.

Researchers also have found that exercise is likely to reduce depression and
anxiety and help you to better manage stress. (personal health zone)