Stairs vs. Escalators

I know for a fact that 90% of you guys would rather take the escalator than the stairs. It's just human nature to rest and save energy rather than expend it. The result, though, is that we get fat and use up the earth's energy to power our rest (ironic, huh??). Volkswagen attempts to switch that up in this video by placing piano keys on a flight of stairs in a Stockholm train station. As a result, people used the stairs about 60% more. I can't front like I wouldn't be walking up and down those stairs trying to compose my own symphony, but is that really what we need to keep ourselves fit? Entertainment suitable for the Tellytubies? If so, you can find me at the gym, working hard to drop the weight that escalators keep on my person...