Healthy Clinical Trial
Official title:
The Impact of Blood Flow Restriction Within Warm-up Routines on Performance and Muscle Stiffness.
Sixty athletes will be randomized in two groups; (1) an experimental group and (2) a control group. Both groups will undergo the following procedure: Moment 1: 1. Baseline testing: countermovement jump, 25m sprint and strength assessment of the Hamstrings and Quadriceps muscle. 2. Short warm-up (approximately 4 minutes), which will be completed with blood flow restriction cuffs (experimental group) or without (control group) 3. Post testing: same tests as performed in baseline. Moment 2: 1. Baseline testing: stiffness measurements of the Biceps Femoris Long Head via Shear Wave Elastography. 2. Short warm-up (approximately 4 minutes), which will be completed with blood flow restriction cuffs (experimental group) or without (control group) 3. Post testing: same tests as performed in baseline. Both moments of testing as well as the order in which the performance tests take place are randomized.
Traditionally, athletes perform a warm-up program before participating in sport activities, due to its assumed beneficial effect on performance and injury prevention. However, within team sports, substitutes usually do not perform the comprehensive pre-match warm-up. In many cases, those substitute players get a very short period of time, during the game, to prepare themselves for coming on to the pitch where they immediately have to perform at a very high-intensity. Hence, this could lead to a poorer performance and a greater injury risk for those substitute players, as they did not get a decent warm-up. Therefore, new techniques are needed in order to prepare the substitute athletes optimally in a very short period of time (often within a few minutes). Consequently, the aim of this study is to investigate whether the incorporation of Blood Flow Restriction (BFR) within a warm-up routine could be of additional value. Both performance parameters and muscle stiffness will be evaluated. As Hamstring strain Injuries (HSI) are common within sports encompassing high-speed running, this muscle group will be investigated on muscle stiffness as a representation of the interventional effect on muscle stiffness. Athletes will be randomized in two groups of 30 participants (anticipated); (1) an experimental group and (2) a control group. Both groups will perform baseline testing (5x Countermovement Jump, 25m Sprint and Muscle Strength of hamstrings and Quadriceps), and a short warm-up program, followed by repeating the same tests as executed in baseline. The experimental group will receive Blood Flow Restriction within the warm-up routine, whereas the control group will do the same warm up program but without BFR. On a separate occasion, the same athletes will perform the same warm-up routine with a Shear Wave Elastographic assessment of the Biceps Femoris Long Head before and after (immediately after, after 5 minutes and once more after 10 minutes) the warm-up. ;
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