I hate to tell yout his, but calf raises wont do anything for you when it comes to your vertical jump.

I used to run track for division I college U of A tobe exact, and i was a high jumper and long jumper by heart. I was a decathlete for them though. all-SEC at that ;-) Icould dunk like mad and im 5'10" ihighjumped 6'8" when iw as a junior in HS and i long jumped 24 feet in college. just to give youa background of my jumping abilities. oh yeah, im white too.

some of you are right though you may not have the right muscles for it. to be able to jump high youneed fast twitch muscles. and what a lot of people dont understand that when you are jumping for a vertical jump your calves do the least work out of your entire leg. your thighs and hip flexors are the absolute most important muscles when it comes to a high vertical jump. I recommend squats, explosive squats. not deep mass amounts of weight squats.

what youwant to do is set up a bench behind you and put a bumper on the bench so that your thighs dont go parallel to the ground, you only want a little less than parallel. Use a weight that is about 50-65% your max, and when you do your squats barely let yourself toucht he bumper and explode upward
emphasizing the forward thrusting motion of your hips.

I did some research once on increasing the vertical jump and came across someinformation that said that in a study among olympic athletes the throwers had a higher vertical jump on average than the jumpers did. and I KNOW that throwers work like CRAZY on squats and jerks and cleans. the hips and thighs are the most important part of getting a good high vertical jump. your arms as well. Its hard to explain how to use your arms, but it can give you an inch or two. What i used to do was sit withmy feet flat ont he ground, and id thrust my arms in a way that wouldmake my body actually come up off the ground. jsut from the force of my arms moving upward. sort ofl ike into a praying pose. LOL iknow it sounds dumb. but it works. anyways that all ihave for now.