The present study was performed to compare
R-R interval data and heart rate variability
indices obtained from the Polar S810i and
the Omega Wave Sport System for a total of 96
adults in a supine position. Data were simultaneously
recorded with the Polar S810i and the
Omega Wave Sport System and processed by
unique software. Bland-Altman analysis for the
R-R intervals shows minimal bias for free and
paced breathing. No signifi cant diff erences were
observed for heart rate variability indices derived
from the signal from both devices, except for the
