Unstable Surface Training for vertical jump Part 1
http://www.jumpmanual.com/215
Unstable surface training has gained much popularity as a training method for vertical jump raining. There is much controversy over whether UST undermines the principle of specificity in training for your vertical jump.
Duration : 0:5:12
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Jump Manual really …
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Yeah i’m a little dry sometimes… but the message is true…
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fell asleep after 1 …
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