Human study · Exercise · 19 Oct 2026
In 12 growing guinea fowl, a leg weight worn from youth removed the extra energy cost of carrying it as adults
Source: Penn State / Proceedings of the Royal Society B
What the research found
Study (guinea fowl, not people). Talayah A. Johnson, Kavya Katugam-Dechene, Jonas Rubenson, and colleagues at Penn State report in Proceedings of the Royal Society B (2026; 293(2074); DOI 10.1098/rspb.2026.0199). ScienceDaily ran it on 14 Oct 2026. Twelve birds were followed from 2 weeks to 16 weeks. Six wore a lead band on one leg equal to 4 percent of body weight. Six did not. At 16 weeks, birds that had never worn the band used 23 percent more energy walking with the load than without it. Birds that grew up with the band used no extra energy to carry it, and on average used no more energy with the band than the untrained birds used walking unloaded. Standing energy did not differ. This is not evidence that a weighted childhood makes human exercise easy. Not medical advice.
Evidence level: Human study. A study in people, but an association isn't proof of cause.
Read the original at Penn State / Proceedings of the Royal Society B
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