Lots of girls struggle with this problem. We spend more effort fighting our hair then our opponent.

thick long hair. They tie it back in a ponytail and it looks great and stays put
through class.
During daily classes I deal with this crappy hair I have but, I have figured out some solutions that I use when competing.
I started getting corn rows for tournaments, I'm not crazy about the look but my hair never moved throughout the entire tournament.
couldn't make it out to CA so I figured out a way to improvise, mini ponytails;
from my bangs to the top of the back of my head.
Warning: You must put the back of your hair up or it looks like a mullet & nobody wants a mullet!
I pull the back up in a pony tail or buns, in my case they are mini buns.
I'm still working on a solution to that and will keep ya posted!