Rule 1.
Keep yourself fit and in shape at all times so you at least stand a chance, we are genetically superior then everyone else when it comes to stamina if we train for it.
Rule 2.
Fight to your strength when faced with superior power, size and speed to negate all of that and use that against them.
For Somali's this is quickly closing the distance employing sabaaxad fighting style in close quarters with elbows, forearms, headbutts etc this will negate their power blows and speed, opponent quickly fatigue this way too.
-----
I seen many fights were toothpick geeljire from back home employed this on very big athletic powerful blacks, completely annihilating them but we are now dealing with a very toxic cowardice generation, guys getting pissed on or placed into bin bags.
The obesity epidemic among our Xaalimo's is catching up, that woman was close to a heart attack from fatigue while not doing anything at all, if a people not predisposed or even known for endurance beat you in endurance for which you are predisposed to genetically, you have no hope!