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Type: Artigo
Title: Predicting VO2max by machine learning models before volitional fatigue during incremental exercise
Author: Beltrame, Thomas
Pereira, Luis
Gois, Mariana
Frade, Maria
Linares, Stephanie
Petronilho, Ariane
Hughson, Richard
Catai, Aparecida
Torres, Ricardo
Abstract: Maximal oxygen uptake (VO2max) is one of the most important clinical indexes that is related to all-cause mortality. However, is only obtained at maximal cardiopulmonary exercise testing (CPET). The main purpose of this study was to predict the VO2max during the early stages of the CPET by machine learning. Forty-five healthy participants (27±5 years old, 69±11 kg and 170±8 cm) performed a CPET in a cycle-ergometer until exhaustion. The time of exercise, workload, variables from the metabolic cart, and the heart rate were recorded throughout the CPET. Variables were combined into clusters according to the time of the CPET where cluster 1 contained data related to the first sec of the CPET, cluster 2 data related to sec 1 and 2, and so on. These variables were considered as inputs for the VO2max prediction for each cluster by Support Vector Machines (Fig 1). The prediction quality was evaluated by the relative error between the measured and predicted VO2max. After 316 sec (52% less of the total CPET average time), VO2max was predicted with an error of 10%. Therefore, machine learning models can be used to predict the VO2max before volitional fatigue. Future studies may explore the use of these models in patient population which would increase the practical applicability of CPET
Subject: Atividade física
Country: Suíça
Editor: European Respiratory Society
Rights: Fechado
Identifier DOI: 10.1183/13993003.congress-2019.PA4132
Date Issue: Nov-2019
Appears in Collections:IC - Artigos e Outros Documentos

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