They do more than teach mechanics. They teach a lot of shoulder strengthening exercises and movements. I expected him to go there after watching the video someone posted about the 30 year old high school coach, with a shattered elbow, throwing 90+ mph pitches after he developed a new training regime. Tom house incorporated this into his program. Deals with strengthening the rear shoulder motions that occur after release as much as the front ones used in throwing before release. Increases the overall strength, speed, control, and accuracy of the arm.