Brian Hayes did some experiments with running on a track and connected them to this paper: <a href="http:&#x2F;&#x2F;bit-player.org&#x2F;2015&#x2F;the-long-run" rel="nofollow">http:&#x2F;&#x2F;bit-player.org&#x2F;2015&#x2F;the-long-run</a>