Therapeutic and orthotic effects of an adaptive functional electrical stimulation system on gait biomechanics in participants with stroke.
Ruxin He, Yiqun Dong, You Li and 4 others
PMID 40102928WHAT IT FOUND
Hybrid adaptive FES to shin and calf muscles improved center-of-pressure symmetry in 8 people with stroke; shin-only FES did not clearly improve it.
Two people showed gait changes after 21 days without stimulation.
Key findings
01Hybrid adaptive FES to both shin and calf muscles improved center-of-pressure symmetry during walking, while shin-only FES did not show a clear improvement.
02Hybrid FES brought stroke participants' symmetry ratios to values that were not different from healthy controls, whereas no stimulation and shin-only FES remained worse than controls.
03After 21 days of training, two participants showed changes in ankle and knee angles, anterior ground reaction force, and symmetry without stimulation, but the long-term study was only a pilot.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The long-term training test included only two participants, so it cannot show that the treatment works for most people with stroke. The evaluation test had only 8 stroke participants and 9 healthy controls, and the healthy controls were not age-matched to the stroke group. The study measured center-of-pressure symmetry on a treadmill, not standard walking tests such as the 10 m Walk Test or 6 min Walk Test. The orthotic effect was judged only by spatial symmetry, not by COP variability or temporal symmetry. The authors' explanations for why training produced changes are speculative.
Declared interests
Funded by National Natural Science Foundation of China, Natural Science Foundation of Guangdong Province, and Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument. The supplied text lists no commercial sponsor or conflict-of-interest declaration.
The easy way to misread this
Do not conclude that adaptive FES improves walking ability after stroke. The orthotic finding was treadmill center-of-pressure symmetry, and the therapeutic finding was only two participants, so it does not establish that patients will walk faster or more safely outside the lab.