Bat speed, arm strength, rotational power, and sprinting are important facets in baseball. Improvement in these areas can be accomplished with the correct training. You could use traditional squats and curls, and while these may add size, it won't dramatically improve any of the aforementioned elements. Adding plyometric training to your regimen will.
During a plyometric exercise, your muscles, ligaments and tendons are loaded with elastic energy and heat which provide speed and power. Think of plyometric training like an internet connection for a moment. Dial up will get you to the internet, but it's slow. DSL is more popular and effective because everything happens so much faster. Plyometric training is like the DSL of training, it trains your muscles to fire instantly.
Incorporating plyometric training into your training will give you that edge.
Turning on a pitch, adding speed to your fastball, your throw from third to first, or from the outfield to home, or from home plate to second, stealing or rounding bases are all going to dramatically improve once you add plyometrics into your training regimen. Check out our library of exercises to find out how you can dramatically improve all of the elements of your game.