For the past couple years I have been training in Pro Wrestling - it's real intense but a lot of fun!
It gives me a new set of skills that I feel complement my career, eg. I spend most time writing software trying to be thorough and spend time thinking things through (sometimes to a fault), whereas being in the ring with someone else requires you to make decisions quickly and trust your instincts. While the training itself is a great workout, it also gives me motivation to do additional work to improve conditioning / strength / etc.
It gives me a new set of skills that I feel complement my career, eg. I spend most time writing software trying to be thorough and spend time thinking things through (sometimes to a fault), whereas being in the ring with someone else requires you to make decisions quickly and trust your instincts. While the training itself is a great workout, it also gives me motivation to do additional work to improve conditioning / strength / etc.