It's the race of the century: Usain Bolt versus Professor Noodles McFluff. Who ya got? (From 2021)
“It’s about understanding the reasons for evolution, and why and how it shapes the body,” Günther says of the project’s goal. “If you ask this question mechanistically, then you can really add to the understanding of how body design is shaped by evolutionary requirements—for example, being fast.
According to the team’s results, the sweet spot for overcoming air drag and inertia lies at around 110 pounds. Not coincidentally, that’s the average weight of both cheetahs and pronghorns. But body size isn’t the only feature that comes into play when maximizing speed. In the model, leg length also mattered. Animals with longer legs are able to push their bodies farther forward before their foot must leave the ground, prolonging the time they have to accelerate between midstance and liftoff.
But what about muscle fatigue? “It doesn’t play any role,” Günther says. One part of their analysis concluded that any animal can accelerate to at least 90 percent of its maximum speed before running out of fuel.
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