“…Controlled breathing maneuver is a methodology widely used to evaluate cardiovascular autonomic control (Pinna et al, 2006 ; Adams et al, 2009 ; Stein et al, 2011 ; Porta et al, 2012 ; Ferreira et al, 2013 ; Krasnikov et al, 2013 ). Widespread evidence showing important effects of respiratory profile (rate, rhythm and amplitude) on beat-to-beat cardiovascular variability (Sakakibara and Hayano, 1996 ; Cooke et al, 1998 ; Bernardi et al, 2001 ; Pinna et al, 2006 ; Carnevali and Sgoifo, 2014 ; Laborde et al, 2017 ; Steffen et al, 2017 ) and the voluntary breathing control was proposed as an effective way to avoid confounding factors in short-time evaluations of cardiovascular variability (Radaelli et al, 1994 ; Pinna et al, 2006 ; DeBeck et al, 2010 ).…”