Work

Effects of low-intensity warm-up associated with blood flow restriction: A study protocol for a randomized controlled clinical trial

Year: 2023

Type: preprint

Abstract: Introduction: Warm-up has the function of preparing the body structures for a given task to be performed during sports, increasing body and muscle temperature, focused 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, skin surface temperature, and perceptual and muscular outcomes. 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 BFR (30% VO2peak), high intensity warm-up without BFR (80% VO2peak) and low-intensity warm-up associated with BFR (80% of total occlusion pressure) [30% VO2peak-BFR]. All groups will carry out the warm-up protocol and the outcomes will be evaluated at baseline and immediately after the end of the warm-up, as well as 10 and 20 minutes after its completion, which are sequentially: skin surface temperature through thermography; tone, stiffness and muscle elasticity by myotometry, subjective perception of pain by analogue pain scale (VAS); pain threshold through the pressure algometer; subjective perception of exertion by the Borg scale; perception of discomfort in relation to BFR on the Likert-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. Discussion: the clinical applicability of this study, if its hypothesis is confirmed, will have as its main focus the performance gain of amateur athletes, preparing them for the game subsequent to the warm-up period, and may also be extended to sports with similar demands, due to the BFR technique being easy to apply and access. Furthermore, BFR during warm-up can also be incorporated within training centers and not just in pre-game moments. Trial registration number: ClinicalTrials.gov, NCT05523674. Registered on 08 November 2022.

Source: Research Square

DOI: 10.21203/rs.3.rs-3188499/v1