This article and any supplementary material should be cited as follows: Hidler J, Brennan D, Black I, Nichols D, Brady K, Nef T. ZeroG: Overground gait.

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Presentation transcript:

This article and any supplementary material should be cited as follows: Hidler J, Brennan D, Black I, Nichols D, Brady K, Nef T. ZeroG: Overground gait and balance training system. J Rehabil Res Dev. 2011;48(4):287–98. DOI: /JRRD ZeroG: Overground gait and balance training system Joseph Hidler, PhD; David Brennan, MBE; iian Black, MBE; Diane Nichols, PT; Kathy Brady, MSPT; Tobias Nef, PhD

This article and any supplementary material should be cited as follows: Hidler J, Brennan D, Black I, Nichols D, Brady K, Nef T. ZeroG: Overground gait and balance training system. J Rehabil Res Dev. 2011;48(4):287–98. DOI: /JRRD Study Aim Present ZeroG, a new overground, body-weight support (BWS) system that helps patients practice safe and controlled gait, balance, and postural activities. Relevance Incorporating BWS into gait therapy allows patients to safely practice high number of steps. Current BWS gait training often restricted to treadmill because of limitations with commercially available systems.

This article and any supplementary material should be cited as follows: Hidler J, Brennan D, Black I, Nichols D, Brady K, Nef T. ZeroG: Overground gait and balance training system. J Rehabil Res Dev. 2011;48(4):287–98. DOI: /JRRD Design ZeroG : – Provides both static and dynamic BWS. – Rides along overhead track, allowing practice while using walking aids and walking on flat surfaces, rough terrain, or stairs. – Uses active trolley system that automatically follows patients as they walk, so they feel vertical unloading forces but very little horizontal forces. (a) Side and (b) top view of ZeroG illustrating custom- series elastic actuator that controls rope force. Top and bottom assemblies have been removed from (b) for clarity. DC = direct current.

This article and any supplementary material should be cited as follows: Hidler J, Brennan D, Black I, Nichols D, Brady K, Nef T. ZeroG: Overground gait and balance training system. J Rehabil Res Dev. 2011;48(4):287–98. DOI: /JRRD Experimental Tests System maintained constant forces, producing much more normal ground reaction forces. Active trolley minimized horizontal forces experienced by patient during gait. (a) Desired movement speeds: 20, 40, 60 in./s (0.5, 1.0, 1.5 m/s). (b) Resulting rope angle averaged over 10 trials. Subject descended approximately 16 in. with level of unloading set to 30 lb.

This article and any supplementary material should be cited as follows: Hidler J, Brennan D, Black I, Nichols D, Brady K, Nef T. ZeroG: Overground gait and balance training system. J Rehabil Res Dev. 2011;48(4):287–98. DOI: /JRRD Conclusions Performance of custom-series elastic actuator and trolley tracking was well within original design goals. Training with ZeroG will allow patients to practice activities critical to functional independence at home and in community.