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

You have to run 75 to 100 miles a week if you expect to break the four-minute mile.

I have not missed a day from work because of illness since 1956.

Exercise is a journey, not a destination. It must be continued for the rest of your life. We do not stop exercising because we grow old - we grow old because we stop exercising.

Over the years, Ive covered 22,000 miles.

Now I say that if you run more than 15 miles a week, it's for something other than aerobic fitness. Once you pass 15 miles, you do not see much further improvement.

If you look at body fat, it seems to increase with age, even though your weight does not. That's a physiological fact of aging, they say. Heck it is. It is an adaptive effect of aging.