Tea extract plus protein for faster knee muscle recovery after downhill jogging
The Influence of Tea Extract on Maximal Voluntary Knee Contraction After 30 Minutes of Downhill Jogging: a Randomized, Double-blind, Placebo-controlled Study
NA · University of Fribourg · NCT07113405
We will test whether adding tea extract to a protein drink helps healthy adults aged 18–40 recover knee muscle strength faster after downhill jogging.
Quick facts
| Phase | NA |
|---|---|
| Study type | Interventional |
| Enrollment | 60 (estimated) |
| Ages | 18 Years to 40 Years |
| Sex | All |
| Sponsor | University of Fribourg (other) |
| Locations | 1 site (Fribourg, Canton of Fribourg) |
| Trial ID | NCT07113405 on ClinicalTrials.gov |
What this trial studies
Healthy adults aged 18–40 are randomly assigned, in a double-blind design, to one of three groups: protein plus tea extract, protein alone, or placebo. The study lasts five days and requires five in-person laboratory visits. On day one participants jog downhill for 30 minutes to produce muscle strain, and each day researchers collect fingertip blood samples, perform thigh ultrasound, measure pain tolerance, test muscle strength, and evaluate muscle function. Only the regeneration product differs between groups so recovery can be compared directly.
Who should consider this trial
Good fit: Ideal participants are healthy adults 18–40 with no food allergies or major medical issues who can safely perform downhill jogging and attend five lab visits in Fribourg.
Not a fit: People with food allergies, current lower-extremity or serious back injuries, cardiovascular disease, or those taking blood thinners or anti-inflammatory medications, as well as individuals outside the 18–40 age range, are unlikely to benefit or may be excluded.
Why it matters
Potential benefit: If successful, adding tea extract to a protein supplement could reduce strength loss and pain and speed recovery after muscle-damaging exercise.
How similar studies have performed: Protein supplementation is known to aid muscle recovery and some studies suggest polyphenol-rich extracts can help, but combining protein with tea extract specifically is less well established.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * Signed written informed consent * Aged between 18-40 years * Healthy subjects Exclusion Criteria: * Any type of food allergy (e.g. nuts) * Health-related problems according to the "Physical Activity Readiness Questionnaire (PAR-Q) * Current injury of the lower extremities * Serious clinical back pain or current back injuries * Orthopedic disorders * Cardiovascular diseases * Current Intake of blood-thinning medication * Current Intake of anti-inflammatory medication
Where this trial is running
Fribourg, Canton of Fribourg
- University of Fribourg — Fribourg, Canton of Fribourg, Switzerland (RECRUITING)
Study contacts
- Study coordinator: Sven Egger, Dr.
- Email: sven.egger@unifr.ch
- Phone: +41 26 300 72 85
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions: Muscle Recovery, Protein, muscle recovery, Tea extract, EIMD