Table 2.

Effects of PMF on HRV parameters.

	Gender	Baseline	Fatigue	t	P	d
RMSSD (ms)	Total	33.26 ± 12.38	18.03 ± 10.33	5.22	0.000	0.50
	M	31.42 ± 13.35	16.76 ± 9.44	3.80	0.002	0.49
	F	35.72 ± 11.03	19.73 ± 11.61	3.44	0.006	0.52
SDNN (ms)	Total	51.46 ± 13.59	38.33 ± 12.58	3.41	0.002	0.33
	M	52.40 ± 15.04	34.38 ± 9.92	3.05	0.012	0.48
	F	50.72 ± 12.86	41.43 ± 13.89	1.85	0.087	0.21
nLF (nu)	Total	55.75 ± 13.01	66.08 ± 7.59	-3.57	0.002	0.35
	M	61.79 ± 9.13	66.86 ± 7.24	-1.65	0.124	0.19
	F	49.21 ± 13.73	65.08 ± 8.17	-3.48	0.005	0.52
nHF (nu)	Total	40.03 ± 9.57	30.36 ± 9.86	3.47	0.002	0.32
	M	37.27 ± 9.46	30.65 ± 10.88	2.15	0.050	0.25
	F	43.80 ± 9.81	29.97 ± 8.77	2.78	0.020	0.44
nLF/nHF (%)	Total	126.39 ± 78.59	211.72 ± 113.29	-4.29	0.000	0.40
	M	155.65 ± 85.37	209.07 ± 120.47	-1.94	0.073	0.21
	F	95.04 ± 56.78	214.56 ± 109.53	-4.46	0.001	0.61

RMSSD, root mean square of successive differences (RMSSD) in RR intervals; SDNN, standard deviation of normal-to-normal RR intervals; nLF, normal power of the low-frequency band (0.04–0.15 Hz); nHF, normal power of the high-frequency band (0.15-0.4 Hz); M, male; F, female.