Bicycle ride (IMAGE) University of Copenhagen - Faculty of Science Caption A single, intense 10-minute bicycle ride prompts a clean-up of muscles as the protein Ubiquitin tags onto worn-out proteins, causing them to be degraded. This prevents the accumulation of damaged proteins and helps keep muscles healthy. Credit Photo: Chris and Simon Branford. Usage Restrictions Creative Commons: https://creativecommons.org/licenses/by-nc/2.0/ License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.