Eli5 why does doing stretches prior to working out make you perform better and less likely to be injured?

Question

Eli5 why does doing stretches prior to working out make you perform better and less likely to be injured?

In: 3

Answer 1

It doesn’t, it is an old belief, in fact has newer science shown that by “warming up” is it not that uncommon to see a 25% reduction in performance, because the body is already tired.