Sports Medicine - Open

Table 1 Cardiorespiratory variables during exercise

From: The effects of endurance exercise in hypoxia on acid-base balance and potassium kinetics: a randomized crossover design in male endurance athletes

	N	H	Main effect		Interaction
	N	H	Trial	Time	Interaction
VO₂(mL/kg/min)	46.9 ± 2.9	36.6 ± 2.3	P < 0.001	n.s.	n.s.
VCO₂(mL/kg/min)	46.3 ± 3.9	34.1 ± 3.4	P < 0.001	P < 0.001	n.s.
RER	0.98 ± 0.04	1.02 ± 0.04	P = 0.001	P < 0.001	n.s.
VE (L/min)	105 ± 17	82 ± 14	P < 0.001	P < 0.001	n.s.
HR (beats/min)	171 ± 7.2	161 ± 7.7	P = 0.001	P < 0.001	P < 0.001
SpO₂ (%)	95 ± 1.7	80 ± 3.1	P < 0.001	n.s.	n.s.

Values are means ± SE
VO2 oxygen uptake, VCO2 carbon dioxide output, RER respiratory exchange ratio, VE expired minute ventilation, HR heart rate, SpO2 percutaneous oxygen saturation

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