New work out

Alright well i saw this ad on a YouTube video it was this website called pitchharder.com. Well they are trying to sell you this video that ain’t cheep and well I was the sucker who baught it there’s one good part in it the rest sucks. The video is basically telling you to use your core when pitching which I don’t agree with because that can lewd to shoulder injury. Any ways the good part is the workout the core exercises with the Medison ball. Just the simple work outs with it.
P.

DO NOT BUY THE VIDEO
It is a waste of your time and money
This added 5 mph to my fastball in three months