This article is from the Aerobics Fitness FAQ, by firstname.lastname@example.org (Robles) with numerous contributions by others.
The questions and answers below represent our best
effort to provide general information. They are not to be
read as gospel. Individual people have different needs and
abilities, and all exercise routines suggested should be
adjusted to suit the specific situation. It is best to
consult a doctor before beginning any lifestyle change
involving exercise, particularly if you have been sedentary,
are very overweight or overfat, or have or suspect any sort
of medical condition which might be exacerbated by exercise.