Guys i need some help. a 15 year old newbie is gonna be training with me for the summer and, like most kids these day he’s got very poor posture. so when he does things like dead lifts the first thing that starts to move is the middle of his back- to the point where he resembles Quasimodo.
any thoughts on how to describe the way a flat back should feel, and what to do to remedy this? i know its a very common problem among you athletes just getting into training. thank.