Or boxing! I prefer Muay Thai, but any competitive fighting sport is good, and almost any city will have some variety of boxing gym available. It's a good ski

Or boxing! I prefer Muay Thai, but any competitive fighting sport is good, and almost any city will have some variety of boxing gym available. It's a good skill to have in general, but it's difficult to beat in terms of a workout (especially if you go to a gym that doesn't coddle). When I run, sometimes I get lazy and go slowly for a bit. When working the bag, though, I slow down and the guy that runs the gym will notice and yell. Even better, when sparring, if you slow down and get lazy, you will get hit, so you squeeze every ounce of energy out. It's valuable for the mind, too, as it keeps your mind from wandering and forces you to pay attention to what you're doing because if you stop thinking about strategy or recognizing patterns the other fighter is showing, again, you get hit. And it begins to be the most relaxing thing you do, when you go into a room where there is no computer, no cell phone, no distraction, just what you're doing now. (It's also surprising how much strategy goes into hitting people; it broadens the mind.) I've found that increasing the demands I make on my body causes me to naturally eat better. Your body makes demands; for example a lack of iron may cause you to crave beef. Training made me start drinking more water and less coffee, and fast food started to actually taste bad. It's like turning up the volume on your body's demands, so what is healthy and what tastes good to you start to align. The first two weeks are the worst, but it's addictive after that.