Figure 1A-D. Changes of activity in the autonomic nervous system after ingestion of capsaicin tablets (CAP) or placebo (CON) at rest and during exercise assessed with using heart rate variability power spectral analysis in the obese. There were no significant differences on autonomic nervous activity at rest and during exercise in capsaicin and placebo trials at any point. A (top left); TOTAL = total power of the spectrum, B (top right); LF = low frequency component of the spectrum, C (bottom left); HF = high-frequency component of the spectrum, D (bottom right); SNS = sympathetic nervous activity. The value of each placebo trial was standardized as 100%. Values represent means ± SE.