If you want to ride the subway in Moscow, you've got two choices: 30 rubles or 30 squats.

In an effort to promote both the upcoming Olympic Games in Sochi and active lifestyles, the metro has installed a vending machine that gives commuters a free ticket in exchange for doing 30 squats.

As the Games draw closer, the Olympic Committee will offer other ways people can work on their fitness around the city, including exercise bikes that produce energy to charge cellphones and hanging handles on buses that double as exercise bands.

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