Most athletes want to jump higher. A detailed presentation on muscle physiology and anatomy won't get you there. Here are a few presentations that SHOW athletes what to do.
You don't need a lot of expensive equipment. I'm a big believer in jumping rope.
USA basketball gives a coherent presentation on the three dimensions needed to increase your vertical - flexibility, strength, and power.
Here are a pair of videos that illustrate the article discusses.
You don't need the extra apparatus...