Well, I aint nobody but this is my 2 cents.

1. Yoga, it's relaxing, it's exercise but then it's slow. My friends who goes for yoga classes say that sometimes, the mind is too relax. Mind becomes so relax until, other 'things' like evil spirit may affect our bodies.

2. Aerobics - dance dance revolution, overall body workout. Surely produce more sweat than yoga.

3. Tai chi - slow motion exercise. Not that much sweat. I learnt before when I was younger. That whole tai chi chuan, hit the person and he flies away is bullshit. And I thought it was real. Sheesh!

Sure or not? Like Wong Fei Hong you mean? If orang besar tolak orang kecik, then ok la, they may land a few feet back... But not until like tai-chi, they hit the person liao, the palm still waving wan... itu I think cina-MAtrix effect la.