Marathon Runner with Kidneys (IMAGE) Johns Hopkins Medicine Caption A study of marathon runners led by Johns Hopkins Medicine and Yale University suggests that fluid volume and sweat sodium losses, rather than a rise in core body temperature, are the key contributors to post-race acute kidney injury. Credit Image of runner courtesy of the US Air Force; image of kidneys courtesy of MedicalGraphics via Creative Commons Usage Restrictions none 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.