The way it works is my company has a professional runner on staff, who runs around a track. The paying clients recline in chairs, at various points along the track. I then hypnotize them and have them all pretend that the pro runner is stationary, and we are all moving, I have them more their arms. Since reference is relative to the observer, and there is no preferred reference, all the clients are now in relative motion without having to actually move. They burn calories. The runner by being stationary, burns much fewer calories, base on the consensus of the majority reference. This allows him to run for hours without getting tired. I feed him one grape per hour.
Congratulations on misunderstanding relativity. The fact that the runner is moving relative to the person sitting in the chair is not what makes them burn calories (a person running on a treadmill isn't moving either, but they are still burning calories). What makes the runner burn calories is, in large part, from the rhythmic contraction of their body's muscles. The muscles will be seen as contracting and extending in any reference frame. Some of the calories burned might also come from wind resistance (which, again, will be seen in any reference frame), but that's probably a minor component.