i got 6" in 6 weeks (3" after 2 phase's) doing VJB begginers plyo's and bodyweight but thats probably cause my stats were so crap before i started.

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Vertical Jump Bibe - Bodyweight program (will start very soon)

End stats from prevvious program

running : 29"
standing : 23"

Vertical Jump Bible - Body weight and begginers plyometric

10" gain in 12 weeks