Table 2.

Cardiac ultrasound and iK measurements before and after submaximal exercise

	Rest	Exercise	P‐value	Effect size
SV (mL)	62.8 ± 18.8	75.5 ± 20.5	0.009	0.68
HR (b.p.m.)	73 ± 14	94 ± 21	0.001	0.88
CO (L/min)	4.4 ± 1.2	6.9 ± 1.8	0.001	0.87
Cardiac cycle (mJ.s)
iK BCG	0.0026 ± 0.0017	0.0052 ± 0.0061	0.01	0.65
iK SCG	0.32 ± 0.22	0.42 ± 0.39	0.31	0.26
iK BCG * HR	0.18 ± 0.10	0.48 ± 0.63	0.001	0.84
iK SCG * HR	24.2 ± 17.8	44.3 ± 56.0	0.07	0.47
Systolic phase (mJ.s)
iK BCG	0.0014 ± 0.0012	0.0030 ± 0.0032	0.01	0.66
iK SCG	0.16 ± 0.12	0.27 ± 0.30	0.13	0.40
Diastolic phase (mJ.s)
iK BCG total	0.0011 ± 0.0007	0.0022 ± 0.0030	0.26	0.29
iK SCG total	0.16 ± 0.15	0.15 ± 0.09	0.78	0.07

BCG, ballistocardiography; CO, cardiac output; HR, heart rate; iK, integrated kinetic energy; SCG, seismocardiography; SD, standard deviation; SV, stroke volume.

Values are presented as mean ± SD.