5. NEW! Horizontal Pratyahara: This first recording of its type is optimized for breathing meditation while lying on your back in a horizontal position. Because the autonomic nervous system optimizes the frequency of resonance based on body inclination and position, a slightly slower rhythm is optimal when horizontal. The frequency of .085 Hertz or 1 cycle in 12 seconds is optimal for an erect body position. This recording employs .075 Hertz or 1 cycle in 13.33 seconds. It also incorporates a binaural beat at 6.5 Hz. (upper theta band) against a soothing water background. File Size: ~25MB. Price: $14.95