[Fallyn]

All of these sports will get you in to great physical shape of course each will have you using different muscles more than others. Me personally I would suggest Aikido, Fencing or Ju Jitsu. Aikido is great for maintaining a sense of discipline and for self defense in a non violent way, there's a lot of emphasis on falling and being physically fit. Ju jitsu also is great for discipline but teaches you techniques that allow you to disarm your opponent and "put them out of commission" so to speak. And Fencing is great for balance, speed etc. You'll be feeling the burn each class especially in your thighs.

I would also suggest Judo if you looking to get fit. I took this art for a period of time and found myself becoming stronger and fitter in no time from the intense training.

I hope this somewhat helps. ^^;