I hear it every week "My son/daughter has gotten bigger and stronger but he's not hitting or throwing any harder. In fact, they may have gotten worse. Even though they are now bigger and definitely stronger, they're slower, less explosive and yet we spent months and a ton of money training!" What Gives?
The unfortunate reality is, while general strength training can help athletes develop bigger muscles and gain additional strength, developing power and speed for specific sports movements is different from simply just getting stronger. While strength is a component of hitting power and arm speed, it requires a special type of strength from specific exercises, performed in a precise way, to actually improve hitting power and arm speed.
Its really more about training movements, the specific movements of the sports skill, like hitting and throwing to improve the power and speed of a specific sports movement. And its not our personal belief or bias, its science.