[Walking's] overwhelming advantage is that it can be done by anyone, anytime, anywhere-and it doesn't even look like exercise.

I used to think that it didn't make any difference how far you ran if you had a good, strong musculoskeletal system and no underlying cardiovascular problems.

According to the Gallup Poll, 24 percent of American adults exercised regularly in 1961, and 50 percent after 1968. The peak was 59 percent in 1984, dropping off to 51 percent last September.

Aerobic dancing is already adjusting to injury problems and will probably phase out to some extent.

Far too many times over the next 12 to 15 years, it was brought to my attention that people who followed my exercise guidelines exactly but ignored their diet, their weight and their cigarette smoking had heart attacks at age 55.

It's easier and more cost effective to maintain good health, than to regain it once it's lost.

So I've broadened the fitness concept to make it one of moderation and balance.