Gaming can be addictive. Working out? Not so easily. Cue Fitocracy. It's the product of two people unhappy with their own body image, trying to figure out some way to motivate themselves getting in shape, and putting those efforts into a company.

Small Empires is our new weekly show that visits rising New York City startups and provides never-before-seen access to the men and women building our future. Join Alexis Ohanian as he talks to cofounders Brian Wang and Richard Talens at their office near Union Square — and later gets trained by a Fitocracy user.