Effects of Warm-up Intensity and Blood Flow Restriction

Paulista University

Status: Completed

Conditions: Healthy Men

Treatments: Other: Warm-up exercise with Blood Flow Restriction; Other: Warm-up exercise

Study type: Interventional

Funder types: Other

Identifiers

NCT05523674

Warm-up_BRF_FCT/UNESP

Details and patient eligibility

About

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.

Enrollment: 108 patients

Sex: Male

Ages: 18 to 35 years old

Volunteers: Accepts Healthy Volunteers

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);

Trial design

Primary purpose: Other

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Double Blind

---

108 participants in 3 patient groups

warm-up performed at 30% VO2max

Experimental group

Description:

The warm-up exercise will be performed on an ergometric treadmill, through a protocol of 15 minutes duration, with the first 5 minutes of acceleration, until reaching 30% of VO2max, the following 5 minutes of maintenance and the remaining 5 minutes being of slowdown.

Treatment:

Other: Warm-up exercise

warm-up performed at 80% VO2max

Experimental group

Description:

The warm-up exercise will be performed on an ergometric treadmill, through a protocol of 15 minutes duration, with the first 5 minutes of acceleration, until reaching 80% of VO2max, the following 5 minutes of maintenance and the remaining 5 minutes being of slowdown.

Treatment:

Other: Warm-up exercise

warm-up performed at 30% VO2max with Blood Flow Restriction

Experimental group

Description:

The warm-up exercise will be performed on an ergometric treadmill, through a protocol of 15 minutes of duration, with the first 5 minutes of acceleration, until reaching 30% of VO2max, the following 5 minutes of maintenance and the remaining 5 minutes being of slowdown. During the warm-up exercise, a pressure cuff will be used on each leg, with the blood flow restriction technique (80% of arterial occlusion pressure).

Treatment:

Other: Warm-up exercise with Blood Flow Restriction