”A guide as vast and varied as its author’s career. Mackie Shilstone is equally fluent in hardcore academic research and resonant common sense. In his work with boxers Michael Spinks and Bernard Hopkins, Mackie managed significant improvement in two athletically finished products. Imagine what he can do for the average man or woman.”

Jim Lampley
HBO Sports and NBC Sports, 
on Mackie’s book “Lean and Hard.”