Overground walking speed changes when subjected to body weight support conditions for nonimpaired and post stroke individuals

When I used the Lite-Gait, the lack of weight caused my gait to get noticeably worse because my spasticity then had full rein to express itself. And it expressed itself very badly. The  Lokomat worked because the legs were strapped down and the spasticity couldn't take over.
http://search.naric.com/research/rehab/redesign_record.cfm?search=2&type=all&criteria=J65577&phrase=no&rec=120873
NARIC Accession Number: J65577.  What's this?
ISSN: 1743-0003.
Author(s): Burgess, Jamie K.; Weibel, Gwendolyn C.; Brown, David A..
Project Number: H133E070013.
Publication Year: 2010.
Number of Pages: 10.
Abstract: Study examined changes in self-selected walking speed in non-impaired subjects and individuals who had suffered a stroke when subjected to body weight support (BWS). Eleven non-impaired subjects and 12 post-stroke subjects walked at a self-selected speed over a 15-meter walkway. BWS was provided to participants at 0, 10, 20, 30, and 40 percent of the subject's weight while they walked overground using a robotic gait and balance training system. Gait speed, cadence, and average step length were calculated for each subject using recorded data on their time to walk 10 meters and the number of steps taken. Results indicated that when subjected to greater levels of BWS, self-selected walking speed decreased for the non-impaired subjects. However, post-stroke subjects showed an average increase of 17 percent in self-selected walking speed when subjected to some level of BWS compared to the 0-percent BWS condition. Most subjects showed this increase at the 10-percent BWS level. Gait speed increases corresponded to an increase in step length, but not cadence.