Physical exercise is any bodily activity
that enhances or maintains physical fitness and overall health and wellness. It
is performed for various reasons including strengthening muscles and the
cardiovascular system, honing athletic skills, weight loss or maintenance, as
well as for the purpose of enjoyment. Frequent and regular physical exercise
boosts the immune system, and helps prevent the "diseases of
affluence" such as heart disease, cardiovascular disease, Type 2 diabetes
and obesity. It also improves mental health, helps prevent depression, helps to
promote or maintain positive self-esteem, and can even augment an individual's
sex appeal or body image, which is also found to be linked with higher levels
of self-esteem. Childhood obesity is a growing global concern and physical
exercise may help decrease some of the effects of childhood and adult obesity.
Health care providers often call exercise the "miracle" or
"wonder" drug—alluding to the wide variety of proven benefits that it
provides.
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