Effects of Warm-up Intensity and Blood Flow Restriction: A Randomized Controlled Clinical Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 108
- 试验地点
- 4
- 主要终点
- Temperature
研究概览
简要总结
Introduction: warming up has the function of preparing the body structures for a given task to be performed during sports, increasing body and muscle temperature, focusing on improving performance. Therefore, the use of the blood flow restriction technique (BFR) can be seen as a promising alternative for promoting greater mechanical and muscular stress, thus providing a more efficient warm-up and optimizing performance. Objectives: to analyze the effects of RFS used during low-intensity warm-up compared with low-intensity and high-intensity warm-up without RFS on performance (jump test and 30-meter sprint test) and skin surface temperature. In addition to analyzing and comparing, after the warm-up protocols with and without RFS, the acute responses on perceptual outcomes (perception of pain, change in sensitivity, subjective perception of exertion and perception of discomfort in relation to RFS) and muscle outcomes (tonus , muscle stiffness and elasticity). Methods: a randomized controlled clinical trial will be carried out, with 33 amateur soccer players aged between 18 and 35 years who will be randomly divided into three groups: low-intensity warm-up without RFS (30% VO2max), high-intensity warm-up without RFS ( 80% VO2max) and low-intensity warm-up associated with BFR (80% of total occlusion pressure) [30% VO2max-BFR]. All groups will carry out the heating protocol and the outcomes will be evaluated at baseline and immediately after the end of the heating, as well as 10 and 20 minutes after its completion, namely: skin surface temperature through thermography; tone, stiffness and muscle elasticity by myotometry, subjective perception of pain (VAS); pain threshold through the pressure algometer; subjective perception of exertion (BORG scale); perception of discomfort in relation to RFS (LIKERT-CR-10 scale); 30-meter sprints measured through photocells and vertical jump, measured through the force platform. Descriptive statistics will be used and comparisons will be made using the generalized linear mixed model, assuming a significance level of p<0.05.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Other
- 盲法
- Double (Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •amateur soccer player
- •aged between 18 and 35 years
排除标准
- •alcoholics;
- •use drugs that influenced cardiac autonomic activity;
- •cardiovascular, metabolic or endocrine diseases;
- •having one or more predisposing risk factors for thromboembolism;
- •history of lower extremity surgery or musculoskeletal injury within the last six months that may impair your performance during testing or warm-up (e.g., meniscal repair, ligament reconstruction, muscle injury, tendinopathy, lower extremity patellofemoral pain, and/or back pain);
结局指标
主要结局
Temperature
时间窗: Immediately after warm-up
Skin surface temperature will be evaluated using a thermographic camera
Performance in 30 meter sprint
时间窗: Immediately after warm-up
the sprint test will be performed in a hall and two pairs of photoelectric cells (Multisprint®, Hidrofit, Brazil) will be used with an accuracy of 0.01 seconds.
Performance in Squat Jump Test
时间窗: Immediately after warm-up
The squat jump test will be performed at jumping platform (Multisprint, Hidrofit, Brazil)
次要结局
- Perceived discomfort Scale (Likert-RFS)(At the baseline and Immediately after warm-up)
- Tone muscular through Myotonometry used the MyotonPRO equipment(At the baseline and Immediately after warm-up)
- Phase angle through Bioimpedance analysis (BIA)(At the baseline and Immediately after warm-up)
- Perceived Effort Scale (Borg)(At the baseline and Immediately after warm-up)
- Stiffness through Myotonometry used the MyotonPRO equipment(At the baseline and Immediately after warm-up)
- heart rate variability indices in the frequency domain(At the baseline time (30 minutes rest in the supine position), during the warm-up (15 minutes in the treadmill) and immediately after the warm-up (60 minutes rest in the supine position))
- Muscle Pain(Immediately after warm-up)
- heart rate variability indices analyzed in the Poincaré plot(At the baseline time (30 minutes rest in the supine position), during the warm-up (15 minutes in the treadmill) and immediately after the warm-up (60 minutes rest in the supine position))
- Pain threshold(Immediately after warm-up)
- Resistance through Bioimpedance analysis (BIA)(At the baseline and Immediately after warm-up)
- Reactance through Bioimpedance analysis (BIA)(At the baseline and Immediately after warm-up)
- heart rate variability indices in the time domain(At the baseline time (30 minutes rest in the supine position), during the warm-up (15 minutes in the treadmill) and immediately after the warm-up (60 minutes rest in the supine position))
研究者
Franciele Marques Vanderle
Phd Assistant Professor
Paulista University