What makes you jump higher?

Answer 1

Basically the genetic makeup of your body, the muscle fibers, people are born with two types of fibers, slow twitch and fast twitch which is used for dunking.

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Answer 2

Achilles stretches and jumping up and down about 100 times

Answer 3

when you stretch more your jump gets gradually higher and higher as you stretch more and get stronger

Answer 4

Exhale on the way up.

Answer 5

Rubber and steel as in a trampoline.