Cocoa to Maximize Exercise Training in Older Adults - The COMET Trial
University of Alabama at Birmingham
36 participants
Apr 21, 2026
INTERVENTIONAL
Conditions
Summary
The purpose of the study is to see if regular exercise when combined with a cocoa supplement will improve physical performance and muscle strength compared to regular exercise alone.
Eligibility
Inclusion Criteria4
- Age 55 years and older
- Slow walking speed of < 1m/s
- Willingness to be randomized to either treatment group
- Willingness to participate in all study procedures (muscle biopsy will be optional)
Exclusion Criteria16
- Failure to provide informed consent;
- Regular consumption of flavanol and/or cocoa supplements
- Current involvement in supervised rehabilitation/exercise training program
- Absolute contraindication(s) to exercise training according to American College of Sports Medicine guidelines \[17\]
- Daytime average of systolic blood pressure ≥ 180/100mm Hg.
- Refusal to stop blood thinners such as baby aspirin dose.
- Peripheral vascular disease; peripheral neuropathy; retinopathy
- Severe cardiac disease, including NYHA Class III or IV congestive heart failure, clinically significant aortic stenosis, history of cardiac arrest, use of a cardiac defibrillator, or uncontrolled angina;
- Myocardial infarction or stroke within past year
- Significant cognitive impairment, including known dementia diagnosis or a Mini-Mental State Examination exam score < 24
- Progressive, degenerative neurologic disease, e.g., Parkinson's Disease, multiple sclerosis;
- Severe rheumatologic or orthopedic diseases, e.g., awaiting joint replacement, active inflammatory disease;
- Severe pulmonary disease, requiring either steroid pills or injections or the use of supplemental oxygen;
- Hip fracture, hip or knee replacement, or spinal surgery within past 4 months;
- Other significant co-morbid conditions that would impair ability to participate in the exercise-based intervention
- Simultaneous participation in another interventional trial
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Interventions
12 weeks of daily cocoa (2 capsules/d containing 450 mg cocoa flavanols/d, including 80 mg of (-)-epicatechin) combined with aerobic (30min of moderate-intensity walking) and resistance (30 min of whole-body workout) exercise training 3 times a week
12 weeks of placebo (alike-looking cellulose-based capsules) combined with aerobic (30min of moderate-intensity walking) and resistance (30 min of whole-body workout) exercise training 3 times a week
Locations(1)
View Full Details on ClinicalTrials.gov
For the most up-to-date information, visit the official listing.
NCT07161726