At a minimum walk a mile or more several times a week (or
daily) and move the arms around to loosen up the joints.
If you can't walk or ride a stationary bicycle use a
rowing machine swim or join wheel chair races.
If you can do none of these things you have my sympathy.
I had a young colleague who suffered from polio in child-
hood so one leg was short and supported by a built-up shoe.
One day this person was absent from the office because a
lung had collapsed. He should at least have worked up his
pulse rate and breathing on a rowing machine several times
per week.
Recent TV news said walking as little as 2½ hours per week
can reduce rates of breast cancer so 5 hours can't hurt ...
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