Originally Posted by Trakhak

I'm dubious that there's anything to your hypothesis that gyroscopic force materially affects sprinting efficiency, but if it does, it would be that it provides a useful opposition to pedaling effort. Think of the classic paradox of the irresistible force meeting the immovable object.

More simply, think of the difference between running on asphalt and running on loose sand. (The gyroscopic effect, such as it is, would be analogous to the asphalt, providing a force to push against.)