Investigating the Efficacy of Low or High Dose Tart Cherry on Recovery From Exercise Induced Muscle Damage and Establishing Its Molecular Mechanisms of Action

  • End date
    Apr 30, 2023
  • participants needed
  • sponsor
    PepsiCo Global R&D
Updated on 28 January 2021


To determine the dose-response effects of 10-day tart cherry product consumption (0, 30 ml, and 60 ml) on knee extensor isometric strength 24-h and 48-h after muscle damaging exercise and to elucidate the mechanisms of action for TC supplementation.


Montmorency cherry supplementation has been shown to exert antioxidant and anti-inflammatory effects that can be beneficial for improving recovery from exercise. However, the investigator is currently not aware of how tart cherry polyphenol supplementation produces these effects. This study aims to determine the dose-response effects of 10-day tart cherry product consumption (placebo, 30 ml, and 60 ml Montmorency tart cherry concentrate in a 500 ml beverage) on knee extensor isometric strength 24-h and 48-h after muscle damaging exercise on supplementation Day 8; on enhancing recovery of other measures of muscle function (single leg eccentric and concentric force development and single leg jump height) and muscle soreness; on reducing markers of oxidative stress and inflammation in plasma, muscle and urine; on inducing signaling in muscle via the nuclear factor erythroid 2-related factor 2 (Nrf2) pathway to upregulate endogenous antioxidant enzymes in muscle; on inhibiting muscle cyclo-oxygenase (COX-1 and COX-2).

This study also aims to identify and establish the molecular mechanisms of action through which tart cherry polyphenols exert antioxidant and anti-inflammatory effects. Oxidative stress and inflammatory signaling in primary human myogenic cells will be assessed by incubating primary human myogenic cells (commercial cell line) in sera derived from 6 participants consuming 8-day placebo vs. 60 ml/day Montmorency tart cherry concentrate supplement. Subjects are permitted to participate in both the molecular mechanism of action part of the study (Part A, no exercise component) and the damaging exercise muscle recovery part of the study (Part B).

Condition Muscle Recovery
Treatment 500 ml base solution, 500 ml containing 30 ml tart cherry concentrate diluted with water and base solution, 500 ml containing 60 ml tart cherry concentrate diluted with water only
Clinical Study IdentifierNCT04725149
SponsorPepsiCo Global R&D
Last Modified on28 January 2021


Yes No Not Sure

Inclusion Criteria

Male in good health
BMI 29.9
Recreationally active but not highly trained (Participating in sport or physical activity at least once per week for the last 6 months and lower limb resistance training 1/week) (Part B only)
No lower limb musculoskeletal injury that prevented exercise in the last 3 months (Part B only)
Understanding of the procedures to be undertaken as part of the study
Willing to participate in the exercise protocols (Part B only) and follow supplementation guidelines and other instructions provided by the experimenter
Willing to abstain from caffeine, alcohol and strenuous exercise for two 5 day periods (from 48h prior to muscle damaging exercise and throughout the follow up period; days 6-10 of the trial) for Part B, and abstain from caffeine and alcohol for two 3-day periods for Part A
Willing to keep food diaries for the duration of each arm of the trial and avoid multiple servings per day of foods that have a high polyphenol content from a list provided
Willing to construct their diet for the first arm of the trial from a list of recipes provided, and to then replicate this diet during the second arm of the trial
Willing to wear a triaxial accelerometer throughout each arm of the trial, and during the second arm of the trial to replicate their physical activity pattern completed in the first arm of the trial
Willing to abstain from consumption of anti-inflammatory, analgesic medications or those with anti-coagulant effects especially NSAIDs and aspirin for 48h prior to and throughout each arm of the trial. (Part B only)
Willing to abstain from icing or applying compression bandages to the exercised/biopsied leg (Part B only)
Ability to provide voluntary written informed consent to participate in the study

Exclusion Criteria

<18y or >40y
BMI 30
Inactive or well-trained (see inclusion criteria) (Part B only)
Lower limb musculoskeletal injury in the last 3 months (Part B only)
Under the care of a physician
Known health condition that could interfere with any element of the data collection protocol. Any known pulmonary, gastrointestinal (e.g., irritable bowel syndrome, Crohn's disease), kidney, cardiovascular, or metabolic diseases, blood-borne infections, or coagulopathies including deep vein thrombosis (DVT)
Current regular consumption of nutritional/dietary supplements or previous use of any dietary supplements in the past 6 months known to have a lasting effect
Current use of prescription medication; including the use of an inhaler
Non-steroidal anti-inflammatory drugs, aspirin or other analgesic medication or any anti-coagulants are prohibited during the study and for 48h prior to commencing supplementation
Allergy/sensitivity/intolerance to cherries, any cherry derived product, or any of the additional ingredients found within the TC test products, including sensitivity to sorbitol
Allergy to lidocaine or other local anaesthetics. (Part B only)
Active drug or alcohol dependency
Current or active usage of nicotine or tobacco related products
Participation in a clinical trial within the past 30 days or concurrently during this trial
Participation in any PepsiCo trial within past 6 months, except that Part A participants may take part in Part B after a >=14 day washout from Part A
Inability to provide written informed consent
Clear my responses

How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact



Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

Learn more

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

Learn more

Similar trials to consider


Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note