Corrêa, F. R., Guerra, R. L. F., & Dourado, V. Z. (2013). Reliability of heart rate variability analysis during submaximal exercise in subjects aged 60 years and older. Journal of Respiratory and CardioVascular Physical Therapy, 1(2), 37–43. Retrieved from https://periodicos.ufrn.br/revistadefisioterapia/article/view/3597