Device to measure grip strength (IMAGE) Charité - Universitätsmedizin Berlin Caption ME/CFS is characterized by weakness and/or excessive muscle weakness following activity. This device enables researchers to measure grip strength. Credit © Charité | Anja Hagemann Usage Restrictions May be used free of charge only to cover the accompanying press release and provided full credit is given. License Original 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.