Nathan
New member
I think that might actually be based on the vertical jumps of Olympic weight-lifters. I believe for the lifters it was 38" and for the NBA players it was 36", with a 2" differential anyways. I didn't read this is in a book or article but rather it came up in a conversation with a kinesiology grad student whom I've been discussing training with a lot and I respect so found this interesting. It makes sense to me.

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