The Impact of Blood Flow Restriction Within Warm-up Routines on Performance and Muscle Stiffness.
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 60
- 试验地点
- 1
- 主要终点
- Change in muscle strength
研究概览
简要总结
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:
- Baseline testing: countermovement jump, 25m sprint and strength assessment of the Hamstrings and Quadriceps muscle.
- Short warm-up (approximately 4 minutes), which will be completed with blood flow restriction cuffs (experimental group) or without (control group)
- Post testing: same tests as performed in baseline.
Moment 2:
- Baseline testing: stiffness measurements of the Biceps Femoris Long Head via Shear Wave Elastography.
- Short warm-up (approximately 4 minutes), which will be completed with blood flow restriction cuffs (experimental group) or without (control group)
- 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.
详细描述
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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- Single (Investigator)
入排标准
- 年龄范围
- 18 Years 至 40 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Free of pain at the moment of testing
- •Adult (18+)
- •Athletes (competitive team sport)
排除标准
- •History of a hamstring strain injury
- •History of cardiovascular problems
- •Recent (<1 year) trauma or surgery of the lower extremity
- •Reduced functioning or pain in the lower extremity.
- •Not being able to perform physical activities, for whatever (medical) reason.
研究组 & 干预措施
Blood Flow Restriction
Incorporation of Blood Flow Restriction within the warm-up routine.
干预措施: Warm-up + Blood Flow Restriction cuff (smart-cuff pro device, acting as pressurized tourniquet) (Device)
Control Group
Warm-up routine without any special intervention (no Blood Flow Restriction).
干预措施: Warm-up (Other)
结局指标
主要结局
Change in muscle strength
时间窗: (1) Before the warm-up routine and (2) immediately after the warm-up routine
Muscle strength of the Hamstrings and Quadriceps muscles. Measured via a Hand Held Dynamometer. Strength will be expressed in Newton (N).
Change in sprinting speed
时间窗: (1) Before the warm-up routine and (2) immediately after the warm-up routine
Sprinting speed will be assessed at 5m, 10m and 25m. This via the use of timing gates. This outcome measure will be expressed in seconds (s).
Change in jump height
时间窗: (1) Before the warm-up routine and (2) immediately after the warm-up routine
The jump height will be assessed during 5 consecutive countermovement jumps. This will be assessed with an OptoJump device. The highest jump will be taken into account. The jump height will be expressed in cm.
Change in muscle stiffness
时间窗: (1) Before the warm-up routine, (2) immediately after the warm-up routine, (3) 5 minutes after the warm-up routine, and (4) 10 minutes after the warm-up routine
The stiffness of the Biceps Femoris Long Head of the dominant leg will be assessed via a Shear Wave Elastography Device (Mach 30, SuperSonic Imagine), before and immediately after the warm-up routine. The muscle stiffness will be expressed in Kilopascals (kPa).
次要结局
- level of readiness(Immediately after the warm-up)
- Change in heart rate((1) Right before the warm up, (2) after one minute, (3) after two minutes, (4) after 3 minutes, (5) at the end of the warm up)