Table 1.

Respiratory and cardiac frequencies during spontaneous and paced breathing and power of the MSNA signal, expressed as standard normal variance (power at frequency of interest minus mean power for the entire trial divided by the SD of power for that trial), at these frequencies

	Targeted Breathing Frequency, breaths/min
Variable	Spontaneous	7	14	21	Spontaneous
Respiratory frequency, Hz	0.24 ± 0.01	0.12 ± 0.01	0.24 ± 0.00	0.35 ± 0.00	0.22 ± 0.02
Cardiac frequency, Hz	1.05 ± 0.04	1.07 ± 0.03	1.09 ± 0.04	1.09 ± 0.04	1.06 ± 0.04
Power at respiratory frequency	1.99 ± 0.24	3.11 ± 0.32*	1.82 ± 0.28	1.43 ± 0.22	2.08 ± 0.30
Power at cardiac frequency	4.28 ± 0.44	3.74 ± 0.45	4.03 ± 0.44	3.95 ± 0.52	3.57 ± 0.44

Values are means ± SE; n = 20 experiments. MSNA, muscle sympathetic nerve activity.

^*P < 0.05 vs. all other frequencies by Scheffé's pairwise comparisons following one-way ANOVA.