Table 1.

Participant Characteristics

	HAH (n=5)	Controls (n=12)	P-value
Sex	1M:4F	5M:7F
Age (years)	35 ± 12	40 ± 13	0.472
BMI (kg·m−2)	27 ± 5	27 ± 4	0.999
Height (cm)	168 ± 8	172 ± 11	0.476
Weight (kg)	77 ± 22	80 ± 14	0.738
P50 (mmHg)	16 ± 1	26 ± 1	<0.0001
Haemoglobin (g·dL−1)	18.9 ± 2.1	14.0 ± 1.4	<0.0001
Haematocrit (%)	55 ± 6	41 ± 4	<0.0001
Normoxic $\stackrel{.}{\mathrm{V}}{\mathrm{O}}_2\text{peak}$ (L·min−1)	2.4 ± 1.0	2.5 ± 0.5	0.783
Normoxic $\stackrel{.}{\mathrm{V}}{\mathrm{O}}_2\text{peak}$ (mL·kg−1·min−1)	31.5 ± 6.0	32.1 ± 7.3	0.874
Normoxic PPO (W)	136 ± 38	159 ± 45	0.340
Hypoxic $\stackrel{.}{\mathrm{V}}{\mathrm{O}}_2\text{peak}$ (L·min−1)	2.4 ± 0.8	2.2 ± 0.4	0.495
Hypoxic $\stackrel{.}{\mathrm{V}}{\mathrm{O}}_2\text{peak}$ (mL·kg−1·min−1)	30.9 ± 4.9	28.6 ± 6.6	0.496
Hypoxic PPO (W)	130 ± 28	141 ± 42	0.568

Abbreviations: HAH, high affinity haemoglobin; M, male; F, female BMI, body mass index; P₅₀, partial pressure of oxygen at which haemoglobin is 50% saturated; $\stackrel{.}{\mathrm{V}}{\mathrm{O}}_2\text{peak}$, peak oxygen uptake, PPO, peak power output. Values displayed as mean ± SD.