sorry I want to say doing sit ups. My English isn't good enough

I'm not an expert but as far as I know your abs are a part of your upperbody so it has nothing to do with your vertical(lowerbody).

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Standing Vertical: 24-24.5 inches
Running Vertical: 25-26 inches

no, you wont really gain any vertical from abs. at max 1-2 inch if you're lucky.

as for ab exercises, sit ups suck.
and lastly, learn to edit your post

lol only 1-2 inch?!?!

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i think crunches are better? abs won't do much for your vert, but that crossing thing near the ab is very important, i forgot what's that call, like traversus or something.

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If you have a med ball, search jumpusa for the RV ab program.

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you guys shouldn't posts information unless you know for sure what you are talking about

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sit ups ARE good for your vert... repeat ARE! they work your hip flexors and that in return is part the p-chain which helps ur vert. so do situps, but don't do them slow or weighted... do them explosive and as fast as possible

ps - try not to knock yourself out doin them so fast. lol