Shoes Reshape Ankle Bones, Skewing Fossil Comparisons — SkimNews
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- Farrell and Tsegai's team used high-resolution CT scans to map the talus bone in 56 modern humans, finding that habitual shoe wearers and barefoot people show distinctly different patterns in trabecular (spongy) bone architecture.
- The barefoot sample — 13 Andaman Islanders, two Khoisan from southern Africa, and one Aka hunter-gatherer from Central Africa, all from the mid-19th century — had denser spongy bone at the front of the ankle, with struts running in a wider range of directions consistent with flexed-foot positions like squatting or climbing.
- Shoe-wearing US adults who died since 2000 showed greater total trabecular bone volume concentrated toward the inside and back of the ankle, which the researchers link to shoes channeling loading inward and holding the foot in a more extended position.
- The result has direct fallout for paleoanthropology: fossil hominin ankle bones have typically been compared to modern industrial-society skeletons, meaning prior reconstructions of ancient walking styles may have been biased by shoe-induced bone changes.
- Malorie Albee at Northern Michigan University called the data "crucial baseline information" for foot evolution studies, while Thomas Püschel at Oxford urged future work to disentangle shoes from body size, terrain, and activity differences.
- The study was published in the Journal of Anatomy (DOI: 10.1111/joa.70236).
Why it matters: Paleoanthropologists routinely reconstruct how extinct hominins walked by comparing their ankle bones to those of modern humans — but those modern skeletons have almost always come from lifelong shoe wearers. With 56 CT scans now showing shoe-driven shifts in trabecular bone, future fossil comparisons will need to use barefoot-reference data before drawing conclusions about ancient locomotion.
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