The human body can exert a lot of energy, and when a bunch of people get together this energy increases even more. One place where human energy is at an all time high is at the gym; tons of people working out in one place for an end goal of a physically fit body. Why not harness all of this energy to power something? Well, an Italian firm from Carlo Ratti Associati created a brilliant way to harness human energy to power a floating gym. The gym is designed to float down the Seine River in Paris, giving gym goers a lovely view while they exercise. The floating gym can hold up to 45 people and shows them exactly how much energy they are exerting. Check out some images of this gym below!