I don't think "priming" your muscles is necessary because it's an evolutionary advantage, but because that's the best muscles evolution has come up with so far.

I don't think "priming" your muscles is necessary because it's an evolutionary advantage, but because that's the best muscles evolution has come up with so far. It's like saying "why would I have to change the oil in my car, why would an engineer make an engine that needs that?". And jumping 5ft for a cat probbaly is the priming, that's not peak performance for them.