Salvatore, I don't know what you base your deduction from but I assure you it's no nasm "bullshit". Its a well documented fact when you do a self-myofacial release before warm ups and training you greatly reduce the risk of injury. Its not hear say, its fact. A couple of points, if someone has let's say plantar faciitus besides tyring to rest, you take a golf or tennis ball to roll under your foot preferably under the arch, why? Because it loosens the facia and the band that runs to the ball to the heel of your foot, same goes with muscle throughout the body, has a shething of "facia" between, loosen that up, gets your CNS going a little then you lessen the risk of injury, roll over a "knot" roll on it till about 60-70% of the pain is gone. Point 2...if it were bullshit I completely assure that 99.5% of the S&C coaches at major universities in the country and world wouldn't be doing it!!