Analysis of Sinus Variability in a Group of Cameroonian Athletes

Table 3

Repartition of the study population according to the parameters of the frequency analysis.

Variables	Sedentary (n = 15)	Sportsmen
		Footballers (n = 21)	Handballers (n = 24)
VLF
Absolute power (ms^2)	45.27 ± 2.90	281.90 ± 69.27^c	200.70 ± 29.53
Absolute power (log)	3.66 ± 0.08	5.09 ± 0.24^c	4.86 ± 0.16^c
Relative power (%)	16.21 ± 0.64	26.87 ± 1.76^b	30.82 ± 2.67^c
LF
Absolute power (ms^2)	170.80 ± 16.31	603.80 ± 100.80^b	658.30 ± 83.09^c
Absolute power (log)	5.04 ± 0.15	5.85 ± 0.32	6.03 ± 0.19^a
Relative power (%)	75.35 ± 0.86	64.64 ± 1.51^b	69.26 ± 2.63
Normalized powers (n.u.)	87.23 ± 1.47	88.30 ± 1.09	89.18 ± 1.24
HF
Absolute power (ms^2)	22.95 ± 1.33	78.52 ± 13.16^c	42.76 ± 5.15^y
Absolute power (log)	2.50 ± 0.16	3.92 ± 0.22^c	3.46 ± 0.16^b
Relative power (%)	8.39 ± 0.38	8.61 ± 0.51	6.96 ± 0.42
Normalized powers (n.u.)	12.79 ± 1.18	11.14 ± 0.62	10.90 ± 0.76
Normalized powers
Total power (ms^2)	246.40 ± 18.04	836.10 ± 103.70^c	927.30 ± 94.12^c
Ratio LF/HF	7.55 ± 0.58	8.46 ± 0.50	9.07 ± 0.60
Nonlinear analysis
SD1 (ms)	5.89 ± 0.34	13.56 ± 1.57^c	11.44 ± 0.84^b
SD2 (ms)	20.14 ± 0.83	36.48 ± 2.81^c	36.32 ± 2.40^c
Ratio SD2/SD1	3.50 ± 0.14	3.37 ± 0.46	3.31 ± 0.19

Each value represents the mean ± MSE, ^a. ^b and ^c denote significant difference from sedentary people, and ^y denotes significant difference from footballers. HF: high frequency; LF: low frequency. SD₁ and SD₂: standard deviations of the scattergram; VLF: very low frequency.