Clinical trial NCT05523674: Effects of Warm-up Intensity and Blood Flow Restriction
Official title: Effects of Warm-up Intensity and Blood Flow Restriction: A Randomized Controlled Clinical Trial
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Healthy Men
Keywords: Vascular occlusion
Performance
Body temperature
warm-up
Lead sponsor: Paulista University
Sponsor class: OTHER
First posted: 2022-08-31
Enrollment: 108
Sex: MALE
Minimum age (years): 18
Maximum age (years): 35
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: OTHER

Brief summary: 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.


Eligibility criteria: Inclusion Criteria:

* male
* healthy
* amateur soccer player
* aged between 18 and 35 years

Exclusion Criteria:

* smokers;
* 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);

Primary outcomes:
measure: Temperature
timeFrame: At the baseline
measure: Temperature
timeFrame: Immediately after warm-up
measure: Performance in Squat Jump Test
timeFrame: At the baseline
measure: Performance in Squat Jump Test
timeFrame: Immediately after warm-up
measure: Performance in 30 meter sprint
timeFrame: At the baseline
measure: Performance in 30 meter sprint
timeFrame: Immediately after warm-up
Secondary outcomes:
measure: Pain threshold
timeFrame: At the baseline
measure: Pain threshold
timeFrame: Immediately after warm-up
measure: Muscle Pain
timeFrame: At the baseline
measure: Muscle Pain
timeFrame: Immediately after warm-up
measure: Perceived Effort Scale (Borg)
timeFrame: At the baseline and Immediately after warm-up
measure: Perceived discomfort Scale (Likert-RFS)
timeFrame: At the baseline and Immediately after warm-up
measure: Resistance through Bioimpedance analysis (BIA)
timeFrame: At the baseline and Immediately after warm-up
measure: Reactance through Bioimpedance analysis (BIA)
timeFrame: At the baseline and Immediately after warm-up
measure: Phase angle through Bioimpedance analysis (BIA)
timeFrame: At the baseline and Immediately after warm-up
measure: Tone muscular through Myotonometry used the MyotonPRO equipment
timeFrame: At the baseline and Immediately after warm-up
measure: Stiffness through Myotonometry used the MyotonPRO equipment
timeFrame: At the baseline and Immediately after warm-up
measure: heart rate variability indices in the time domain
timeFrame: 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)
measure: heart rate variability indices in the frequency domain
timeFrame: 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)
measure: heart rate variability indices analyzed in the Poincaré plot
timeFrame: 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)
Other outcomes:
Locations:
city: Presidente Prudente
country: Brazil
facility: Franciele Marques Vanderlei
state: SP
city: Presidente Prudente
country: Brazil
facility: Carlos Alberto Toledo Teixeira Filho
state: São Paulo
Study officials:
References: