Relaxation or Regulation: The Acute Effect of Mind-Body Exercise on Heart Rate Variability and Subjective State in Experienced Qi Gong Practitioners

Figure 4

Frequency power distribution in five sample participants. Power spectra of five different participants during initial rest (RS 0), first Qi Gong (Qi 1), second Qi Gong (Qi (2), and second rest (RS 1). VP 2, VP 9, and VP 12 from the Chinese sample are examples that display a high degree of VLF band corrected (<0.004 Hz) coherence (SP coherence) at a peak around 0.05 Hz. VP 15, also from the Chinese sample, is an example for medium SP coherence and VP 32 from the German sample displays no SP coherence.