Greg Sawicki and Exoskeleton Device (IMAGE) North Carolina State University Caption Dr. Greg Sawicki displays exoskeleton devices, including ones that increase human walking efficiency by 7 percent in a study published in Nature. Credit Marc Hall, NC State University 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.