I've never practiced self-defense/martial arts before but am considering either Wing Chun for Krav Maga. I imagine that flips and rolling upside down is required for some training? I have an inherited issue where I get very dizzy when upside down. My sister even passes out, I have yet to but it still makes me very nervous and that's my one reason for not trying martial arts/self-defense so far. Is it all in my head or what? I'm also 6'7", 230lb, 14% bf. I'm not overweight but not exactly toned either so I'm not sure how well I can actually do a flip or sommersalt if required. lol Do you experience many flips, upside down rolling, etc.. in your martial arts?