The 1,462 days of January are finally behind us. Chances are, you've probably already canceled that gym membership you signed up for in the midst of a “new year, new me!” haze, and the thought of going for a run when—in much of the northern hemisphere, at least—it's cold, gray, dark, and wet feels masochistic. If that's you, you're not alone, with some research showing around 20 percent of gym-goers starting in January quit within a month, and only a meager 22 percent are still going after a year. But what if you didn't have to go to the gym at all? What if you could work off any festive excesses by playing video games instead?