A new study by researchers at the University of Wisconsin-Madison explains how hibernating animals use bacteria in their gut to maintain muscle density over the winter. The findings could lead to solutions for people with muscle-wasting disorders or astronauts headed on prolonged journeys into space.
Hannah Carey is a professor emeritus at UW-Madison’s School of Veterinary Medicine and an author of the study. She said scientists have known for years that ruminant animals, like cows and sheep, are able to recycle their own nitrogen as a way to build muscles while eating a low protein diet. Nitrogen is a vital building block of amino acids and proteins.