A professional acquaintance of mine is this opinionated guy with tons of tattoos and quite the attitude. He also practices some pretty potent martial arts. Someone recommended he take a yoga class, and he said it was one of the best workouts he's ever had. He's still doing it, far as I know! If you want to see a guy kicking ass at yoga, check out one of
this guy's DVDs. I believe each DVD has a demo of him doing advanced Ashtanga yoga moves -- it's totally insane, the moves this guy can do. He's insanely strong!
As far as other natural medicine, some people consider chiropractic work to be "alternative," but it took care of my mild scoliosis when I was a kid, and also alleviated my asthma (makes sense, since if your spine is curving improperly behind your chest, it will constrict your breathing). My primary care physician is this great homeopathic doctor, too, that I've been seeing since I was young. He has this super cool biofeedback machine that reads energy in points on your hands and feet. He uses a mix of homeopathic and Western medicine, and I was always impressed by how he relates to his patients.