Table 3

Partial correlation between time and frequency domain parameters of heart rate variability and subject characteristics of athletes and controls pooled, after age correction (n = 22)

	LVM	LVMI	E/A peak	E/A area	Pcr/ATP rest	Pcr/ATP stress
MeanNN	0.48^3-150	0.44	0.48^3-150	0.29	0.29	0.11
SDNN	0.32	0.30	0.28	0.23	0.13	0.15
CVNN	0.21	0.19	0.10	0.11	−0.02	0.13
SDANN	0.20	0.13	−0.22	−0.25	0.44	0.60^3-150
RMSSD	0.07	0.08	0.42	0.48^3-150	0.41	0.12
pNN50	0.27	0.38	0.25	0.19	0.54^3-150	0.11
ln LF	0.00	0.00	0.03	0.07	−0.15	0.00
ln HF	−0.03	−0.04	0.15	0.20	0.21	0.20
ln LF/HF	0.05	0.06	−0.17	−0.20	−0.46	−0.28

ln, natural logarithm; CVNN, coefficient of variation of all RR intervals; E/A area, ratio of early and atrial filling volume; E/A peak, ratio of peak early and atrial filling; HF, high frequency power (>0.15–0.4 Hz); LF, low frequency power (0.05–0.15 Hz); LVM, left ventricular mass; LVMI, left ventricular mass index; meanNN, mean of all RR intervals between normal beats; PCr, phosphocreatine; pNN50, percentage of successive RR intervals differing more than 50 ms; RMSSD, root mean square of successive differences in RR intervals among successive normal beats; SDANN, standard deviation of the average RR intervals during all 5 minute periods; SDNN, standard deviation of the RR intervals.
p Values are nominal; no correction for multiple testing was employed.
↵3-150 p < 0.05, 3-150p < 0.01.