Vertical Jump Increased by Hanging from Bar

[Guest guest]

I was in lab doing some work when a discus thrower mentioned getting ~3 inches

on his vertical after hanging from a chin up bar. So I got the three of us who

were in there to measure our vertical and then hang about 30 seconds and

remeasure and sure enough all of us increased. Anyway I was just curious as to

whether anyone has heard of hangs increasing vertical and if so why it does. I

am assuming it has something to do with stretching the shoulder to improve

reach?

Thanks

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