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

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

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.

I don't criticize weight training - as long as it is not a substitute for aerobic training.

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

The reason I exercise is for the quality of life I enjoy.

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.