@article{articlee2099e28,
title   = {Heart rate variability and cardiovascular fitness: what we know so far},
author = {Souza, Hugo Celso Dutra de and Philbois, Stella Vieira and Oliveira, Ana Catarine da Veiga and Aguilar, Bruno Augusto},
year = {2021},
doi = {10.2147/VHRM.S279322},
journal   = {Vascular Health and Risk Management}
}