Table 1.

Heart rate (HR) and pre-ejection period (PEP) during baseline and speech task as a function of power and stability.

	Low Power		High Power
	Unstable	Stable	Unstable	Stable
Heart rate
M (SD) Baseline M (SD) Speech M (SD) Reactivity 95% CI t d	77.61 (13.39) 87.04 (13.75) 9.43 (8.71) (4.96; 13.91) 4.47∗∗∗ 2.24	80.93 (13.44) 86.70 (11.45) 5.77 (10.68) (0.46; 11.08) 2.29∗ 1.11	75.04 (7.11) 87.22 (12.76) 12.49 (9.35) (7.68; 17.30) 5.51∗∗∗ 2.76	73.45 (15.09) 84.68 (10.20) 11.93 (6.60) (8.54; 15.32) 7.45∗∗∗ 3.73
Pre-ejection period
M (SD) Baseline M (SD) Speech M (SD) Reactivity 95% CI t d	121.65 (15.04) 104.00 (25.73) -17.65 (19.08) (-27.46; -7.84) -3.81∗ 1.90	126.67 (17.94) 122.67 (18.20) -4.00 (15.52) (-11.72; 3.72) -1.09 0.53	118.82 (18.31) 107.11 (17.22) -12.47 (14.96) (-20.27; -4.78) -3.44∗∗ 1.71	121.26 (15.89) 110.35 (15.24) -11.52 (2.29) (-17.69; -5.36) -3.97∗∗ 1.99

The reported t-tests test CV-reactivity against 0 (i.e., baseline); ^∗p < 0.05; ^∗∗p < 0.01; ^∗∗∗p < 0.001.