Years ago my friend group was heavily into Beat Saber, custom maps, the whole deal. We played at least 3 hours a day, every day, all piling into a dorm and taking turns on a Vive until we were so tired we couldn't move. After graduating and moving I hadn't bothered to set the whole VR rig back up again. I finally dusted it off a few months ago and holy crap have I gotten out of shape. It took me a good 12 hours of playing to get into the swing of things and several more hours to hit full pace but I'm back. I've lost 12 lbs too - this game's intense.