The Influence of Tea Extract on Maximal Voluntary Knee Contraction After 30 Minutes of Downhill Jogging: a Randomized, Double-blind, Placebo-controlled Study
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 60
- 试验地点
- 2
- 主要终点
- Change in maximum knee extension force immediately after training-induced muscle damage and 24, 48, 72, and 96 hours thereafter compared to baseline.
研究概览
简要总结
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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- Double (Participant, Investigator)
入排标准
- 年龄范围
- 18 Years 至 40 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Signed written informed consent
- •Aged between 18-40 years
- •Healthy subjects
排除标准
- •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
研究组 & 干预措施
Protein and tea extract
This group will receive a recovery drink containing protein and tea extract.
干预措施: Protein and tea extract (Dietary Supplement)
Protein
This group will receive a recovery drink containing protein without tea extract.
干预措施: Protein (Dietary Supplement)
Placebo
This group will receive a recovery drink containing a placebo product. The placebo product is a non-isoenergetic, non-protein, artificially flavoured liquid.
干预措施: Placebo (Dietary Supplement)
结局指标
主要结局
Change in maximum knee extension force immediately after training-induced muscle damage and 24, 48, 72, and 96 hours thereafter compared to baseline.
时间窗: 5 days
The maximal force is measured in Nm while the participant is seated on an isokinetic device.
Change in jump performance immediately after training-induced muscle damage and 24, 48, 72, and 96 hours thereafter compared to baseline.
时间窗: 5 days
The jump performance is measured in cm while the participant are performing counter movement jumps.
Change in perceived pain immediately after training-induced muscle damage and 24, 48, 72, and 96 hours thereafter compared to baseline.
时间窗: 5 days
Perceived pain is measured in Pa while the participant is seated on the isokinetic device. The measurement point is on vastus medialis muscle.
Change in muscle thickness immediately after training-induced muscle damage and 24, 48, 72, and 96 hours thereafter compared to baseline.
时间窗: 5 days
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.
Change in creatine kinase levels immediately after exercise-induced muscle damage and 24, 48, 72, and 96 hours thereafter compared to baseline.
时间窗: 5 days
Creatine kinase is measured in U/L and determined using a capillary finger blood sample of 0.25 ml.
次要结局
未报告次要终点