Normally, it costs 30 rubles (92 cents) to ride the Moscow subway. These days, you can also pay in sweat.
City officials have installed machines that track commuters as they do a series of squats. Do 30, knees fully bent, and get a free ticket. It's all part of an effort to promote exercise ahead of next year's Winter Olympics. See how the ticketing machine works in the video below:
Alexander Zhukov, president of the Russian Olympic Committee, told the RIA-Novosti newswire: "We wanted to show that the Olympic Games is not just an international competition that people watch on TV, but that it is also about getting everyone involved in a sporting lifestyle."
Get your squats in now: the machines are set to disappear before Christmas, presumably to the dismay of all the squatters in this video.