Table 2.

P-values of the factors resulting from the mixed models performed on each cardiorespiratory parameter

	Intercept	Altitude	Exercise	Mask	Altitude sequence a	Rest-exercise sequence b	Gender	Altitude × exercise	Altitude × exercise × mask
PaCO 2	<0.001	<0.001	0.039	0.016	0.114	0.012	<0.001	0.039	1.000
PaO 2	<0.001	<0.001	<0.001	1.000	1.000	0.639	0.376	0.032	1.000
SaO 2	<0.001	<0.001	<0.001	0.420	<0.001	<0.001	<0.001	<0.001	1.000
SpO 2	<0.001	<0.001	<0.001	1.000	1.000	1.000	1.000	<0.001	1.000
pH	<0.001	<0.001	0.101	1.000	1.000	1.000	1.000	0.199	1.000
[La]	<0.001	0.630	0.043	1.000	1.000	1.000	1.000	0.339	1.000
[HCO 3  −]	<0.001	1.000	1.000	0.695	1.000	1.000	0.027	1.000	1.000
HR	<0.001	0.003	<0.001	1.000	0.626	1.000	0.229	0.607	1.000
f R	<0.001	1.000	<0.001	1.000	1.000	1.000	1.000	0.599	1.000
ScO 2	<0.001	<0.001	1.000	1.000	0.788	1.000	1.000	0.035	1.000

Linear mixed models were used, except for ScO₂ a generalised linear mixed model with Gamma distribution was performed. P-values are adjusted by means of Holm–Bonferroni correction. N = 8.

^aFirst 250 m then 3000 m vs first 3000 m then 250 m.

^bFirst rest then exercise vs first exercise then rest; ×, interaction.