Shocking pain away: tDCS and exercise tested for fibromyalgia
NCT ID NCT03371225
First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tested whether combining a gentle brain stimulation technique called tDCS with aerobic exercise could improve the body's natural pain control system in people with fibromyalgia. 116 adults with fibromyalgia received either active or sham tDCS along with exercise or a control activity for 4 weeks. The goal was to see if the combination boosted pain inhibition more than either treatment alone.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- transcranial direct current stimulation (tDCS) device
- What this could lead to
- If it works, this could point toward a non-drug treatment option for fibromyalgia pain that combines brain stimulation with exercise.
- What could go wrong
- This is a completed early-stage mechanistic trial, not a large-scale effectiveness study. Results may not translate to lasting pain relief for all patients.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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116 people
The number who actually took part.
- Started
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May 2019
- Finished
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Oct 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 65 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Age range 18-65 years, 2. Diagnosis of FM pain according to the ACR 2010 criteria (existing pain for more than 6 months with an average of at least 4 on a 0-10 VAS scale) without other comorbid chronic pain diagnosis, 3. Pain resistant to common analgesics and medications for chronic pain such as Tylenol, Aspirin, Ibuprofen, Soma, Parafon Forte DCS, Zanaflex, and Codeine, 4. Must have the ability to feel sensation by Von-Frey fiber on the forearm, 5. Able to provide informed consent to participate in the study. Exclusion Criteria: 1. Clinically significant or unstable medical or psychiatric disorder, 2. history of substance abuse within the past 6 months as self-reported (if subject reports a history of substance abuse, we will confirm using DSM V criteria), 3. Previous significant neurological history (e.g., traumatic brain injury), resulting in neurological deficits, such as cognitive or motor deficits, as self-reported, 4. Previous neurosurgical procedure with craniotomy, 5. Severe depression (If a patient scores \>30 on the Beck Depression Inventory, one will obtain clearance. If one does not pass the medical clearance, one will not be included in the study) 6. Pregnancy (as the safety of tDCS in pregnant population (and children) has not been assessed (though risk is non-significant), the investigators will exclude pregnant women (and children). Women of child-bearing potential will be required to take a urine pregnancy test during the screening process and at every week of stimulation), 7. Current opiate use in large doses (more than 30mg of oxycodone/hydrocodone or 7.5mg of hydromorphone (Dilaudid) or equivalent), 8. Patients will be excluded when they have increased risk for exercise
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Spaulding Rehabilitation Hospital for Continuing Care
Cambridge, Massachusetts, 02138, United States
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Other studies related to the condition(s) this trial covers.
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