As you get old you have to train smarter. Every young guy goes through it; every young guy says I'm invincible, it will never happen to me. The body is like a car or machine, you work it so often that eventually it's going to break down.

John Quinlan Muscle & Strength Audio Podcast Interview by Steve Shaw, Bodybuilder And Wrestler John Quinlan Talks About His Passion For Lifting (2010)