J. Cottingham M.S., S. Porges, Ph.D., and T. Lyon, M.D., Frances Nelson Health Center, Illinois, 1987
Parasympathetic tone was assessed by:
- Quantifying the amplitude of the respiratory sinus arrhythmia from the heart rate pattern.
- Measuring heart rate.
The pelvic lift increased the tone of the parasympathetic nervous system. This is usually associated with decreased levels of stress.