What Researchers Did
Researchers investigated whether one week of normobaric intermittent hypoxic exposure combined with exercise training improved endurance performance at a 4300-meter altitude in 17 male lowlanders.
What They Found
There was no improvement in time trial performance from pre-treatment to post-treatment in either the intermittent hypoxic exposure (IHE) group (62.0 +/- 4.8 to 63.7 +/- 5.2 minutes) or the sham group (60.9 +/- 6.3 to 54.2 +/- 6.8 minutes). Seven of 11 participants in the IHE group could not complete the full 720-kJ time trial, leading to analysis being limited to the 360-kJ halfway point.
What This Means for Canadian Patients
This study suggests that a week of intermittent hypoxic exposure combined with exercise may not enhance endurance performance for Canadian athletes or individuals preparing for high-altitude activities. Canadians planning to engage in strenuous activities at high altitudes should consider other proven acclimatization strategies rather than relying on short-term hypoxic exposure.
Canadian Relevance
This study has no direct Canadian connection as it was not conducted in Canada, nor did it involve Canadian participants or researchers.
Study Limitations
A key limitation was that many participants could not complete the full time trial, necessitating analysis of only the halfway point.