Health TrialsbyHealthPanel

Influence of Tea Extract on Maximal Voluntary Knee Contraction Following Downhill Jogging

ConditionMuscle Recovery
Trial statusRecruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age18-40
SponsorUniversity of Fribourg

About this trial

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.

Eligibility criteria

This trial accepts healthy volunteers

Qualifiers

Signed written informed consent

Aged between 18-40 years

Healthy subjects

Disqualifiers

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

Trial design

Design model

Parallel

Treatments tested in this trial

  • Protein and tea extract

    Dietary supplement

    Participants in this group will receive 4 times a recovery drink containing protein and tea extract.

  • Protein

    Dietary supplement

    Participants of this group will receive ten times a recovery drink containing only protein without tea extract.

  • Placebo

    Dietary supplement

    Participants of this group will receive 10 times a placebo containing no protein nor tea extract.

Treatment groups

60 Participants
are divided into 3 treatment groups
Group A: Protein and tea extractExperimental treatment 1 intervention
Group B: ProteinActive comparator 1 intervention
Group C: PlaceboPlacebo comparator 1 intervention

Trial outcomes

Primary outcomes

1

Change in maximum knee extension force immediately after training-induced muscle damage and 24, 48, 72, and 96 hours thereafter compared to baseline.

The maximal force is measured in Nm while the participant is seated on an isokinetic device.

Time frame
5 days
2

Change in jump performance immediately after training-induced muscle damage and 24, 48, 72, and 96 hours thereafter compared to baseline.

The jump performance is measured in cm while the participant are performing counter movement jumps.

Time frame
5 days
3

Change in perceived pain immediately after training-induced muscle damage and 24, 48, 72, and 96 hours thereafter compared to baseline.

Perceived pain is measured in Pa while the participant is seated on the isokinetic device. The measurement point is on vastus medialis muscle.

Time frame
5 days
4

Change in muscle thickness immediately after training-induced muscle damage and 24, 48, 72, and 96 hours thereafter compared to baseline.

Muscle thickness is measured with b-mode ultrasound in mm while the participant is sitting on the isokinetic device. The measurement point is on the vastus medialis muscle.

Time frame
5 days

Secondary outcomes

Other outcomes

Sponsors and contacts

Click on the lead sponsor to view all of their trials.

University of Fribourg

Lead sponsor

Source ClinicalTrials.gov
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