I think we can all agree on the importance of being in shape.
However, I'd like to invite you guys to take a swing (hah) at learning some basic martial arts techniques. If you ever find yourself in a situation where you'd need to fight, having a basic understanding of the techniques can make all the difference. Also, many people underestimate the stamina part of fighting. Fighting is exhausting.
This video gives you an 11 minute lesson into shadow boxing. It sounds short, but I'll talk to you at the end of the lesson.
I myself am trained in boxing and judo, so I know this video does not 100% prepare you for a real fight. You'd have to take lessons for that and practice, practice and practice. But it gives you at least some form of basic technique. It's also a great and fun way to boost your stamina. I advise to do this in front of a large mirror if possible, so you can see your technique, your defense and your footwork yourself. This way you can correct yourself during the exercise. Or you can film it if you like.
Good luck, comrades!