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

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.

There are six components of wellness: proper weight and diet, proper exercise, breaking the smoking habit, control of alcohol, stress management and periodic exams.

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

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

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.

After 26 years, I am still practicing what I preach.