Inspired by Hamsters

Given this is an option, who needs a treadmill? The guy looks to be rocking it, even though we are more used to seeing hamsters running on wheels like this one. Given the form of this wheel, we can appreciate how challenging it must also be. At least, it seems sufficient to support a fully developed individual.

The more we consider it, the more we hope this image is altered; otherwise, it should accompany a hazard warning. Fairly, someone could market these as treadmills free of electricity if they ever try to sell them. Perhaps this is what ancient people did to maintain their shape.