Gabe Mirkin, M.D.
Studies of Harvard and University of Michigan varsity
letter-winners have shown that they do not live longer than their
less-athletic classmates, but people who exercise regularly as
they age live three to seven years longer than non-exercisers.
Other studies show that athletes have no lower risk of heart
attacks later in life than their less athletic peers unless they
continue to exercise as they age. Former athletes who continue
to exercise have lower blood levels of the bad LDL cholesterol,
total cholesterol, triglycerides and higher levels of the good HDL
cholesterol that prevents heart attacks. This is called reversibility.
Every benefit gained by exercising is lost soon after you stop.
Muscles enlarged by lifting heavy weights return to their previous
size within a few weeks after you stop lifting. People who do
aerobic exercise lose their slow heart rates and greater
endurance soon after they stop regular workouts.
Regular exercise is the most effective way to prevent the
gradual weight gain that often comes with aging. If you're tired of
being out of shape, check with your doctor. Then pick a
continuous sport that you will enjoy doing, such as walking,
swimming, cycling or dancing. Start out by exercising slowly and
comfortably until your muscles start to feel heavy or hurt, and
then stop for the day. Do this every other day and gradually
increase the time you spend exercising, always stopping when
your muscles feel heavy or hurt. When you can exercise
continuously for 30 minutes, three times a week regularly, you
are fit and don't need to do more unless you want to.
September 15, 2006