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Zazen and Cardiac Variability

From the Department of Psychiatry, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey (P.L.), Piscataway, NJ; Komazawa University (Y.S.); and Tokyo Seitoku University (Y.S.), Tokyo, Japan.

View larger version (23K): [in a new window]   Fig. 1. HR and HR variability for a 32-year-old Zen nun during pre-Zazen rest. Top, HR. Bottom, Spectral power. BPM = beats/min; HF = high frequency; LF = low frequency; IHR = instantaneous heart rate.

View larger version (24K): [in a new window]   Fig. 2. HR and HR variability for a 32-year-old Zen nun during Zazen. Top, HR. Bottom, Spectral power. BPM = beats/min; HF = high frequency; LF = low frequency; IHR = instantaneous heart rate.

View larger version (23K): [in a new window]   Fig. 3. HR variability for a 42-year-old Zen master (KS) during pre-Zazen rest. Top, HR. Bottom, Spectral power. BPM = beats/min; HF = high frequency; LF = low frequency; IHR = instantaneous heart rate.

View larger version (24K): [in a new window]   Fig. 4. Cardiac interbeat interval for Zen master (KS) during Zazen. Top, HR. Bottom, Spectral power. BPM = beats/min; HF = high frequency; LF = low frequency; IHR = instantaneous heart rate.