[KoZeN]

It's amazing how fast you can get tired in a situation where you're going all out

This is a point that gets overlooked far too often. I have seen plenty of people in peak physical fitness run out of steam after 2 to 3 minutes.

What most people forget is that as well as physical exertion your body releases a massive amount of adrenaline the second a punch is thrown and that wipes you out. It's called an adrenaline dump and it honestly feels like your legs have turned to jelly and you feel like you have zero power behind your punches.

Moral of the story; hit hard and be accurate.