If you could do a little bit of exercise in exchange for a train ticket, would you? Passengers at the Vystavochnaya station, west of Moscow, are doing just that as part of a promo for the Winter Olympics in Sochi.

The idea is to get people active and amped for the games in February, and for 30 squats, passengers get a free ride on the subway, which costs around a buck.

Olympic Change, which is responsible for the ticketing scheme, is collecting similar ideas, crowdsourcing different ways to get Russians involved in the run-up to the Olympics. So far, people have submitted everything from bike-powered mobile phone chargers to musical stairs, with one winner being announced next month and having their idea brought to life.