I'm still picking up the pieces of my continously blown mind about the difference between burning air and burning sugar (aerobic and anaerobic) in order to think and move. It explains, like, 90% of tai-chi stuff.

When I look at this topic and chart, I think fear is definately a sugar-burner. That's why breathing is harder but also the best thing to improve. I'm not even sure if the oxygen-burning slow-twitch muscles even do fear. Maybe slow-twitching = courage. It feels like that's kind of the thing.