Exercise boosts brain blood flow in aging veterans, study finds
NCT ID NCT03803904
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at whether a 12-week indoor cycling program could improve brain blood flow and function in 37 older veterans (ages 65-80) who did not exercise regularly. Researchers measured brain health before and after the exercise program using MRI scans. The goal was to learn how exercise affects brain aging and may help prevent diseases like dementia.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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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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37 people
The number who actually took part.
- Started
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Apr 2019
- Finished
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Jan 2026
- Lead sponsor
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A government agency
The lead sponsor is a US federal agency other than the NIH.
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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65 to 80 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
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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: * Adults aged 65-80 who do not regularly exercise * defined as exercising less than 20 minutes twice per week * Are willing and able to cooperate with assessments and interventions * Participant will be quantified at or below the "poor" range for cardiovascular fitness as assessed by a volume of oxygen (VO2) test * 26.0 ml/kg/min for males * 21.0 ml/kg/min for females) * 26 on the MoCA to meet the criteria for cognitively intact * Participants will be free from diseases affecting cognition or that would interfere with their ability to engage in aerobic exercise - including but not limited to: * chronic heart * liver * kidney disease * Free from diseases/injuries directly affecting brain functions - including but not limited to: * significant closed head injury * open intracranial wounds * stroke * epilepsy * degenerative diseases of the nervous system * All subjects will speak English as a primary language and will have at minimum a high school diploma so that behavioral/cognitive measures reflect effects of aging and aerobic exercise and not unfamiliarity with the English language or a lack of education Exclusion Criteria: * Potential participants with major psychiatric disorder - including but not limited to: * psychosis * major depression * bipolar disorder * Individuals with ongoing drug or alcohol abuse and severe hypertension (systolic BP \> 200 or diastolic BP \> 110 mm Hg or subjects taking three or more antihypertensive medications * Participants must not have conditions incompatible with MRI - including but not limited to: * ferrous metal implants * cardiac pacemakers or similar devices * claustrophobia * morbid obesity * Persons engaging in significant skilled manual movements regularly will be excluded so that behavioral/motor measures reflect the effects of age and aerobic exercise and not the effects of frequent practice
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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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Atlanta VA Medical and Rehab Center, Decatur, GA
Decatur, Georgia, 30033-4004, United States
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Other studies related to the condition(s) this trial covers.
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