Table 2. High-energy phosphates and pH in human skeletal muscle: trekkers vs. climbers before hypoxic exposure.

		Trekkers (n = 7)	Climbers (n = 7)
PCr (mM)	Resting	30.7±0.8	31.3±0.7
	Exercising	18.0±2.6	18.8±1.6
	After recovery	32.9±0.5	29.4±0.8
PCrt1/2 (s)	During recovery	22.2±1.6	16.1±1.1 **
Pi (mM)	Resting	2.3±0.2	2.9±0.2 *
	Exercising	11.6±1.8	12.9±2.2
	After recovery	1.3±0.2	1.5±0.1
ADP (µM)	Resting	28±3	26±2
	Exercising	53±5	54±8
	After recovery	20±2	24±2
ΔG'ATP (mM J−1)	Resting	−63.3±0.5	−62.7±0.3
	Exercising	−58.0±0.7	−57.4±0.6
	After recovery	−65.7±0.4	−64.8±0.3
pH	Resting	7.09±0.005	7.10±0.003
	Exercising	6.94±0.05	7.05±0.02
	After recovery	7.08±0.02	7.08±0.01

All values are means ± S.E.M.

*different from trekkers at p<0.05;

**different from trekkers at p<0.01.