ZeroG: overground gait and balance training system

Hidler, Joseph; Brennan, David; Black, Iian; Nichols, Diane; Brady, Kathy; Nef, Tobias (2011). ZeroG: overground gait and balance training system. Journal of rehabilitation research and development, 48(4), pp. 287-98. Washington, D.C.: U.S. Dept. of Veterans Affairs 10.1682/JRRD.2010.05.0098

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A new overground body-weight support system called ZeroG has been developed that allows patients with severe gait impairments to practice gait and balance activities in a safe, controlled manner. The unloading system is capable of providing up to 300 lb of static support and 150 lb of dynamic (or constant force) support using a custom-series elastic actuator. The unloading system is mounted to a driven trolley, which rides along an overhead rail. We evaluated the performance of ZeroG's unloading system, as well as the trolley tracking system, using benchtop and human-subject testing. Average root-mean-square and peak errors in unloading were 2.2 and 7.2 percent, respectively, over the range of forces tested while trolley tracking errors were less than 3 degrees, indicating the system was able to maintain its position above the subject. We believe training with ZeroG will allow patients to practice activities that are critical to achieving functional independence at home and in the community.

Item Type:

Journal Article (Original Article)


10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Gerontechnology and Rehabilitation
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology

UniBE Contributor:

Nef, Tobias




U.S. Dept. of Veterans Affairs




Factscience Import

Date Deposited:

04 Oct 2013 14:14

Last Modified:

08 Apr 2014 13:53

Publisher DOI:


PubMed ID:


URI: (FactScience: 207050)

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