no i mean. the improvement in your jump depends on your situation before you used it. for example i use it, i'm sure i'd gain only a few inches. cause i'm pretty much an advanced jumper
air alert works really well
i heard that jumpsoles/those plyo shoes work pretty good
if u need to find info jus go to google.com and search for airalert or sumthin
u cud also do squats everyday thats helps too, jus go all the way down as many times as u can and increase that #
jumpsoles puts so much pressure on your calves and thighs. add it with a training program, damn the results will be amazing. both of them are expensive though.
Re: what is best to train vertical jump
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