Exo-LiFFT interactive calculator (IMAGE) Vanderbilt University Caption Exo-LiFFT interactive calculator to assess effect of back exoskeletons on injury risk. Credit Karl Zelik Usage Restrictions N/A 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.