Random Worldbuilding Questions (Biology, Geography, Society, etc.)

[Wyntonian]

So, I was looking into Fast Twitch Muscle Fibers.

What sort of ramifications would there be if a species had a more Fast Twitch than Slow Twitch Fibers?

Rather fast, but easily exhausted? Difficulties with sustained exertion?

Better sprinting capabilities, probably more scary in close combat. They would be more likely to be either an ambush predator like a tiger or a non-herd herbivore, like a rabbit. They're less likely to be a herd animal like buffalo, or endurance predators like humans.