Oxygen deficit and anaerobic threshold in the incremental exercise in normoxia and hypoxia.

The differences between VO2 at the 5th min in steady state exercise and VO2 in incremental exercise were consecutively added from start of incremental exercise to a given time. These added values were defined as oxygen deficit. Anaerobic threshold was determined as the breakpoint of blood lactate during incremental exercise. The oxygen deficit at the anaerobic threshold in normoxia was almost identical to that in hypoxia.