Exercising Before Bedtime (IMAGE) ETH Zurich Caption Moderate intensity exercise shortly before bedtime does not negatively affect sleep. At most, vigorous exercise close to bedtime might have a negative effect. Each symbol in this overview represents one set of experimental data. Credit ETH Zurich / Jan Stutz 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.