NCT06495190 · Appalachian State University
Cognition, Flavonoids, Exercise, Gut Microbiome
What this study is about
This NIH project will examine the effects of routine flavonoid-rich blueberry intake (12-weeks), combined with or in the absence of regular moderate exercise, on cognitive function in a clinical population of older participants identified as experiencing age-related cognitive changes.
View original scientific description
This NIH project will examine the effects of routine flavonoid-rich blueberry intake (12-weeks), combined with or in the absence of regular moderate exercise, on cognitive function in a clinical population of older participants identified as experiencing age-related cognitive changes. This project's hypothesis is that the combination of flavonoid-rich diet and routine physical activity may potentiate cognitive benefits and reduce cognitive decline in an aging population, via mechanisms mediated by the gut microbiome.
Interventions
DIETARY_SUPPLEMENT
Blueberry
50 g/d blueberry powder supplement
BEHAVIORAL
Walking
Five 45-min walking sessions per week
DIETARY_SUPPLEMENT
Placebo
50 g/d placebo powder supplement
BEHAVIORAL
Stretching
Five 45-min stretching sessions per week
Primary outcome measures
Cognition
Time frame: Change from pre-study to 6-weeks and 12-weeks
Cognitive function using the Cambridge Neuropsychological Test Assessment Battery (CANTAB, Cambridge Cognition, Ltd).
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Score on the Montreal Cognitive Assessment (MoCA test) of 24.1-25.2 that indicates mild cognitive decline. The MoCA test score ranges from 0 to 30, with higher scores from 26 to 30 considered normal.
- Healthy, non-smoking male or female participants 65 to 85 years of age.
- Capable of engaging in a supervised 12-week exercise training program (brisk walking or stretching).
- Physically inactive (defined as less than 150 min/week moderate or less than 75 minutes vigorous aerobic and/or resistance exercise during the past 4 weeks).
- Willingness to be randomized to one of four groups.
- Willingness to provide blood, urine, and fecal samples (3 each),
- Willingness to avoid blueberry intake during the 12-weeks study (other than what is provided through the study).
- Willingness to maintain current diet and physical activity patterns during the study (other than what is prescribed as a part of the study), and make no formal attempts to lose or gain body weight.
- Willingness to be a participant in this study only and not enter any other studies.
Exclusion criteria
- Allergy to blueberries.
- Diagnosis of Type I or Type 2 diabetes.
- Chronic cardiovascular, metabolic, or renal condition that is uncontrolled (controlled defined as stable for 6 months or more).
- History of signs or symptoms during rest or physical activity such as chest discomfort, unreasonable breathlessness, dizziness, fainting, or blackouts.
- Use of any prescription or over-the-counter drug intended to support cognition or with known cognitive side effects.
- Any other concurrent condition or use of medications or supplements which, in the opinion of the study clinician would preclude participation in this study.
- Diagnosis of dementia.
Where
- Kannapolis, North Carolina
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Mar 12, 2025 · Source of record for eligibility and locations