Research on Effect of Load Stimulation Change on Heart Rate Variability of Women Volleyball Athletes

Table 4

Changes of HRV frequency-domain indexes of female volleyball players at different load stages.

	LF/HF	HF	HF n.u.	LF	LF n.u.	VLF
The early stage of the winter training	0.85 ± 1.45	836.46 ± 32.57	69.67 ± 2.72	293.64 ± 30.67	30.33 ± 2.72	92.59 ± 3.78
Middle of winter training	0.42 ± 0.30	746.62 ± 35.09	73.38 ± 3.40	293.58 ± 30.55	26.62 ± 3.40	90.79 ± 3.16
Late winter training	0.99 ± 2.18	1300.62 ± 37.56	67.49 ± 1.62	989.18 ± 12.46	32.51 ± 9.62	101.69 ± 6.74
F	0.770	1.628	0.492	2.394	0.492	0.134
P	0.468	0.205	0.614	0.100	0.614	0.875