Influence of Tea Extract on Maximal Voluntary Knee Contraction Following Downhill Jogging (ITMVC-DJ)

University of Fribourg

Status: Enrolling

Conditions: Muscle Recovery

Treatments: Dietary Supplement: Protein and tea extract; Dietary Supplement: Placebo; Dietary Supplement: Protein

Study type: Interventional

Funder types: Other

Identifiers

NCT07113405

2025-01302

Details and patient eligibility

About

In this research project, we want to investigate whether the combined intake of proteins and tea extract has an influence on muscle regeneration compared to the sole intake of proteins or a placebo product. In the study, you will be randomly assigned to one of 3 groups. Neither the research group nor you will know which group you are assigned to. The study lasts 5 days for you as a participant. During these 5 days you will have to attend a total of 5 appointments in our laboratory. The groups differ only in the intake of the regeneration product, otherwise all measurements and appointments are identical. You will jog downhill for 30 minutes on the first day in order to strain your muscles. In order to be able to draw conclusions about the regeneration of your muscles, we will carry out the following measurements on all 5 days: Blood sampling at the fingertip, ultrasound of the thigh muscle, pain tolerance of the thigh muscle, strength tests of the thigh muscle, muscle function of the thigh muscle and jumping performance.

Enrollment: 60 estimated patients

Sex: All

Ages: 18 to 40 years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Basic Science

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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60 participants in 3 patient groups, including a placebo group

Protein and tea extract

Experimental group

Description:

This group will receive a recovery drink containing protein and tea extract.

Treatment:

Dietary Supplement: Protein and tea extract

Protein

Active Comparator group

Description:

This group will receive a recovery drink containing protein without tea extract.

Treatment:

Dietary Supplement: Protein

Placebo

Placebo Comparator group

Description:

This group will receive a recovery drink containing a placebo product. The placebo product is a non-isoenergetic, non-protein, artificially flavoured liquid.

Treatment:

Dietary Supplement: Placebo