Table 1.

Comparison of heart rate (HR) and heart rate variability (HRV) data for the Threat 2 situation, before and after both the AVEC and Polar error correction

HR Parameters	After Polar Compared With After AVEC	Before Correction Compared With After Polar	Before Correction Compared With After AVEC
Percentage of errors (%)	p < .001	—	—
	Z = –4.286	—	—
Standard deviation (bpm)	p < .001	p < .001	p < .001
	t = 4.945	Z = –4.114	Z = –4.086
Mean (bpm)	p = .621	p = .605	p = .548
	t = 0.501	t = 0.524	t = 0.610
Median (bpm)	p = .522	p = .513	p = .417
	Z = –0.641	Z = –0.654	t = –8.827
SDNN (ms)	p < .001	p < .001	p < .001
	Z = –4.086	Z = –4.200	Z = –3.986
RMSSD (ms)	p < .001	p < .001	p < .001
	Z = –3.786	Z = –4.286	Z = –4.229
pNN50 (%)	p < .001	p < .001	p < .001
	t = 5.775	t = 6.119	t = 6.313

Student’s paired t test was used if the data were normally distributed, otherwise the Wilcoxon signed-rank test was used (n = 24 for all tests).

Significant results are given in bold.