@article{42d0ac34394d496ab423b7d2387510c7,
title = "Reducing the metabolic rate of walking and running with a versatile, portable exosuit",
abstract = "Walking and running have fundamentally different biomechanics, which makes developing devices that assist both gaits challenging. We show that a portable exosuit that assists hip extension can reduce the metabolic rate of treadmill walking at 1.5 meters per second by 9.3% and that of running at 2.5 meters per second by 4.0% compared with locomotion without the exosuit. These reduction magnitudes are comparable to the effects of taking off 7.4 and 5.7 kilograms during walking and running, respectively, and are in a range that has shown meaningful athletic performance changes. The exosuit automatically switches between actuation profiles for both gaits, on the basis of estimated potential energy fluctuations of the wearer{\textquoteright}s center of mass. Single-participant experiments show that it is possible to reduce metabolic rates of different running speeds and uphill walking, further demonstrating the exosuit{\textquoteright}s versatility.",
author = "Jinsoo Kim and Giuk Lee and Roman Heimgartner and Revi, {Dheepak Arumukhom} and Nikos Karavas and Danielle Nathanson and Ignacio Galiana and Asa Eckert-Erdheim and Patrick Murphy and David Perry and Nicolas Menard and Choe, {Dabin Kim} and Philippe Malcolm and Walsh, {Conor J.}",
note = "Funding Information: The authors thank M. Athanassiu, B. M. Iwangou, D. Orzel, T. G. Goldy, L. Baker, Y. Ding, F. Panizzolo, A. Couture, Y. M. Zhou, R. Nuckols, S. Lee, J. Foster, and S. Sullivan for their contributions t this work. We thank A. A. Biewener, D. E. Lieberman, and the anonymous reviewers for their helpful suggestions for improving the manuscript. Funding: This material is based on work supported by the Defense Advanced Research Projects Agency (DARPA) Warrior Web program (contract no. W911NF-14-C-0051) and the National Science Foundation (award CNS-1446464). This work is also partiall funded by the Wyss Institute for Biologically Inspired Engineering an the John A. Paulson School of Engineering and Applied Sciences at Harvard University. J.K. also appreciates financial support from the Samsung Scholarship. Ph.M. was supported by the Center for Research in Human Movement Variability of the University of Nebraska Omaha and the NIH (P20GM109090). C.J.W. appreciates Publisher Copyright: {\textcopyright} 2019 American Association for the Advancement of Science. All rights reserved.",
year = "2019",
doi = "10.1126/science.aav7536",
language = "English (US)",
volume = "365",
pages = "668--672",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "6454",
}