Table 2.

Group median + MAD of the average normalized heart and breathing rates and the main frequency in the PSD of the heart and breathing rates during the heartbeats counting task.

	Mean rate (normalized, A.U.)				Main frequency (Hz) in the PSD
	Counting heartbeats	Not counting heartbeats	p	Z	Counting heartbeats	Not counting heartbeats	p	Z
Heart rate	− 0.35 ± 0.13	0.35 ± 0.13	0.0001	3.823	0.12 ± 0.05	0.04 ± 0.04	0.0019	− 3.0986
Breathing rate	− 0.02 ± 0.18	0.02 ± 0.18	0.2954	1.0463	0.07 ± 0.01	0.07 ± 0.02	0.2388	− 1.178

p-values were computed using the paired Wilcoxon test over a 30-s period of counting heartbeats and a subsequent 30-s resting period.

Significant values are in bold.