Table 2.

Parameters of a Gaussian model applied to the PDF of the fluctuations in V̇ measurement

	Rest						Moderate exercise
Subject no.	n	xcr (l min−1)	xcrC95(l min−1)	w(l min−1)	wC95 (l min−1)	sr	n	xcw (l min−1)	xcwC95 (l min−1)	w (l min−1)	wC95(1 min−1)	sw
1	175	0.0006	0.0027	0.0562	0.0100	0.0281*	149	−0.0025	0.0058	0.0656	0.0170	0.0328
2	258	−0.0018	0.0037	0.0755	0.0095	0.0378*	152	0.0024	0.0084	0.1035	0.0452	0.0518*
3	356	−0.0065	0.0058	0.1065	0.0154	0.0533*	177	0.0008	0.0109	0.2090	0.0371	0.1045*
4	138	−0.0015	0.0040	0.0727	0.0107	0.0364*	79	0.0068	0.0169	0.0911	0.0579	0.0456*
5	323	−0.0032	0.0044	0.0925	0.0116	0.0463*	130	0.0005	0.0139	0.1060	0.0405	0.0530*
6	168	−0.0183	0.0078	0.1089	0.0190	0.0545*	267	0.0053	0.0120	0.1921	0.0345	0.0961*
Mean	236	−0.0051	0.0047	0.0854	0.0127	0.0427*	159	0.0022	0.0113	0.1279	0.0387	0.0640*
s.d.	90	0.0069	0.0018	0.0208	0.0037	0.0104	62	0.0034	0.0039	0.0583	0.0135	0.0292
Group response: all data	1418	−0.0044	0.0019	0.0883	0.0043	0.0442*	954	0.0013	0.0039	0.0995	0.0086	0.0498*

Model parameters of the probability density function for the [noise] fluctuation in V̇_O2 measurement for each subject at rest and during the steady state of moderate exercise, and fitted with a Gaussian function. n, number of points; xc_r and xc_w, centre of peak at rest and work, respectively; w, 2 × variance (ω); C₉₅, 95% confidence interval of estimation; s_r and s_w, standard deviation from the Gaussian model during rest and work, respectively.

^*Not significantly different from a Gaussian distribution using χ² goodness-of-fit (P > 0.05).