How Hard is Too Hard?

Huuum - before you get too excited, my question is how hard is too hard when you exercise over 50? Every day when I am working out at the gym, I think about this. Of course, I naturally try the very same hard core exercises and moves that I have always done; sort of being cruel in my method of madness. Then today in a burpee session and breathing extra hard, I had to wonder how hard is too hard. This article helps put into perspective how fit men and women over fifty still have their groove going on but should still listen to our bodies. Training Over 50 from NBC
My New Book

YES - this is WHAT competition OVER 50 looks like!