How young children run around all day without getting tired | Sébastien Ratel & Anthony Blazevich

Credit: Robert Kraft/public domain

April 24, 2018 (Phys.org) -- Children not only have fatigue-resistant muscles, but recover very quickly from high-intensity exercise -- even faster than well-trained adult endurance athletes.

This is the finding of new research published in open-access journal Frontiers in Physiology, which compared the energy output and post-exercise recovery rates of young boys, untrained adults and endurance athletes. The research could help develop athletic potential in children as well as improve our understanding of how our bodies change from childhood to adulthood -- including how these processes contribute to the risk of diseases such as diabetes.

"During many physical tasks, children might tire earlier than adults because they have limited cardiovascular capability, tend to adopt less-efficient movement patterns and need to take more steps to move a given distance. Our research shows children have overcome some of these limitations through the development of fatigue-resistant muscles and the ability to recover very quickly from high-intensity exercise," say Sébastien Ratel, Associate Professor in Exercise Physiology who completed this study at the Université Clermont Auvergne, France, and co-author Anthony Blazevich, Professor in Biomechanics at Edith Cowan University, Australia.

Previous research has shown that children do not tire as quickly as untrained adults during physical tasks. Ratel and Blazevich suggested the energy profiles of children could be comparable to endurance athletes, but there was no evidence to prove this until now.

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