Trial results for a study investigating ischemic conditioning in individuals with Stroke were posted on ClinicalTrials.gov on 2026-02-23, showing that ischemic conditioning led to a mean change in transcallosal inhibition of 133.1 ms compared to 113.3 ms for sham conditioning.
Background
Stroke is a leading cause of long-term disability, often resulting in significant motor impairments that affect quality of life. Rehabilitation efforts frequently focus on restoring motor function, and neuromodulation techniques are emerging as promising adjunct strategies to facilitate changes in brain activity and improve motor behavior following neurological injury. Ischemic conditioning, which involves brief periods of blood flow restriction, is being explored for its potential to induce such neuromodulatory changes, particularly in the lower limb primary motor cortex, with the ultimate goal of improving gait function and motor control in stroke survivors.
Trial design
This completed study, identified as Phase NA, enrolled 20 participants with Stroke. The trial aimed to test ischemic conditioning (blood flow restriction) as a neuromodulatory technique to improve gait function in stroke. The main questions the trial sought to answer included whether ischemic conditioning could produce neuromodulatory changes in the lower limb primary motor cortex and if it could be used to improve strength and motor control. Participants were assigned to either an Ischemic Conditioning group or a Sham Ischemic Conditioning group.
Key results
The trial measured changes in corticomotor excitability, transcallosal inhibition, and ankle motor control:
- Change in Corticomotor Excitability:
- For the Ischemic Conditioning group, the mean change was 0.38 millivolt (mV) (Standard Deviation: 0.24) and 0.41 millivolt (mV) (Standard Deviation: 0.27).
- For the Sham Ischemic Conditioning group, the mean change was 0.37 millivolt (mV) (Standard Deviation: 0.28) and 0.37 millivolt (mV) (Standard Deviation: 0.27).
- Change in Transcallosal Inhibition:
- For the Ischemic Conditioning group, the mean change was 133.1 ms (Standard Deviation: 57.1) and 133.9 ms (Standard Deviation: 62.8).
- For the Sham Ischemic Conditioning group, the mean change was 113.3 ms (Standard Deviation: 64.3) and 118.8 ms (Standard Deviation: 66.2).
- Change in Ankle Motor Control:
- For the Ischemic Conditioning group, the mean change was 0.55 ms (Standard Deviation: 0.24) and 0.52 ms (Standard Deviation: 0.21).
- For the Sham Ischemic Conditioning group, the mean change was 0.58 ms (Standard Deviation: 0.22) and 0.53 ms (Standard Deviation: 0.17).
What this means
The posted results indicate that ischemic conditioning may influence transcallosal inhibition in individuals with stroke, as evidenced by higher mean changes in the ischemic conditioning group (e.g., 133.1 ms) compared to the sham group (e.g., 113.3 ms). However, changes in corticomotor excitability and ankle motor control were largely comparable between the two groups. Given the small enrollment of 20 participants, these findings are preliminary and suggest a potential neuromodulatory effect on specific brain pathways, but do not clearly demonstrate an improvement in ankle motor control based on these measurements. Further research with larger cohorts is needed to establish the clinical significance and potential for improving gait function in stroke patients.
Source
The information regarding these trial results was obtained from ClinicalTrials.gov, a public database of clinical studies. The results for the study NCT05906602, titled "Motor and Neurophysiological Changes After Ischemic Conditioning in Individuals With Stroke", were posted on 2026-02-23 on clinicaltrials.gov.