You're a gold-medal champion of long-distance running ... in Temple Run 2.
Maybe your thumbs get a better daily workout dancing across your smartphone screen than the rest of your body does in a whole week. If you want to reverse that trend, invest in some apps to get fit.
For a minute-long crash course on some great fitness apps, check out this video from the minds at Hack College. They'll whip you into shape, and make sure you have fun doing it.