This paper was the the first to show a statistically significant training effect from the use of FES for the correction of dropped foot in people who have had a stroke. The paper describes the results from 151 people with stroke, MS or SCI who used the ODFS for 18 weeks. ODFS users who had a stroke showed increases in walking speed both with and without the ODFS. ODFS users who had a spinal cord injury responded in a similar way. ODFS users who had MS only improved when the ODFS was used.
The full article is published in Arch Phys Med Rehabil. 1999 Dec;80(12):1577-83.