Estimação do percentual de restrição do fluxo sanguíneo para treinamento físico com oclusão vascular em idosos

Abstract

With the growth of the elderly population, it is necessary to seek strategies for healthy aging, so physical exercise has become an important tool for this process, and its association with the vascular occlusion method is effective in improving different systems. affected by aging. However, caution is needed in practical application to reduce the adverse effects and risks of misuse. In this sense, the objective of this study was to estimate the percentage of blood flow restriction for physical training with vascular occlusion for the elderly population. This is a cross-sectional quantitative study carried out between the period from January 2022 to September 2022 and 250 participants with a mean age of 65.7 ± 5.1 years were included in the study, 45.6% (n=114) male and 54.4% (n=136) female. Body composition was evaluated using the skinfold method, subjects' anthropometry, body circumferences (upper arm and medial thigh), total occlusion pressure using a vascular color-doppler device, and hemodynamic variables of systolic, diastolic, and resting heart rate. From testing the decision tree model by regression, the variables with the best results for predicting and identifying the subjects' total occlusion pressure were divided into upper and lower limbs, in which we can highlight the percentage of body fat, the circumference of the arm, biceps skinfold and diastolic blood pressure for estimating upper limbs with values of R = 0.900 and R2 = 0.81, and also the percentage of fat, medial thigh circumference and diastolic blood pressure for lower limbs with values of R = 0.843 and R2 = 0.71. The mathematical model elaborated, validated, and tested in this study, with good reproducibility, relevance, and low cost suggests that for the prediction of the total occlusion pressure in elderly individuals, the variables that should be for the upper limbs are the percentage of body fat, biceps brachii skinfold, thigh circumference, and diastolic blood pressure, while for the lower limbs, they are body fat percentage, thigh circumference, and diastolic blood pressure.