Childhood Activity May Cut Adult Exercise Effort — SkimNews
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- Penn State researchers studied guinea fowl to determine how childhood limb loading affects adult movement efficiency, using lead bands weighing 4% of body mass on one leg during development
- Guinea fowl that carried weights while growing up walked with the load as adults without increased energy expenditure, while untrained birds used 23% more energy under the same condition
- Jonas Rubenson stated the study provides the first direct evidence that developmental experiences can alter energy use during movement in adulthood, suggesting movement efficiency is adaptable based on early-life activity
- Talayah Johnson and Kavya Katugam-Dechene served as co-first authors of the study published in Proceedings of the Royal Society B, which tracked 12 birds from two to 16 weeks of age under controlled conditions
- National Institute of Arthritis and Musculoskeletal and Skin Diseases funded the research through NIH grants R21AR071588 and R01AR080711, supporting the investigation into developmental biomechanics
Why it matters: If early physical activity similarly shapes movement efficiency in humans, less active children today may face higher energy costs for exercise as adults, making sustained physical activity harder to maintain and potentially worsening long-term public health outcomes related to inactivity.
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