Click here to reply to @Phil

"I knew a lot of friends, and one of them just completely blew out their back and neck trying to jerk lift something they probably shouldn't been doing. But how do you keep up with that and really assess what is good for different people? And is it really a matter of personalization? Does everybody really kind of need their own personal workout plan and nutrition plan for that? Thank you in advance, Ken, and again, really enjoyed your book."