Thanks for the advice and kind words!

To be honest I'm not very fit at the moment. I'm not a fatty, but I'm not toned, and I smoke and occasionally drink.. my body has seen better days. My main reason for wanting to take up a martial art is to get in shape, and self defence comes in at a pretty close second.

Speaking from experience, which martial art or sport would help me achieve a good level of fitness and also teach me enough self defence to be able to stick up for myself in most situations?

Also, what experiences - positive and negative - could you share with me to help me better find my path? :P

One more question... Is there like a minimum level of fitness you need to have before starting something like this? Are there any prerequisites to starting a martial art? Thanks in advance, you cool, crazy cats!