Fig. 3From: The effects of endurance exercise in hypoxia on acid-base balance and potassium kinetics: a randomized crossover design in male endurance athletesChanges in blood pH level (a) and HCO3− concentration (b). Values are means ± SE. The shaded box indicates the duration of exercise. *Significant difference compared with Pre. †Significant difference between the N and H trialsBack to article page