uibk hbi mauna kea study group

On day 4 of our study group-master course excursion we started with the field study leg of our hypobaric-normobaric comparison study at Mauna Kea. The primary outcome parameter of our comparison between the hike to Mauna Kea summit in the field and simulated at the Hermann Buhl institute in Bad Aibling is the shape of the flow volume curve and the single breath to breath comparison in the ergospirometry. On the picture you see one of the subjects with the oxycon mobile at the start point of the hike near the Mauna Kea visitor center at 2800m altitude. The ergospirometry has been repeated in each of the six subjects at the summit at 4169m altitude after the standardised hike in six hours plus one hour breaks.
Secondary parameters are the oxygen saturation and heart rate as well as Lake Louise score at several time points during the hike.
The conditions on this first field day were unexpectedly tough with constant sunshine, no wind and unusual temperatures at all altitudes above 85degrees Fahrenheit respectively above 26-27 degrees celsius. This lead to unexpected electrolyte loss through more sweating than in the simulated hike.
Performing the ergospiro at the summit took until darkness with a beautiful sunset and clear view on the stars but temperatures dropping to 38 degrees F, 1-2 degrees Celsius.
We are thankful to a National Park UH Ranger who drove half of the group down to our second car before the last ergospiro at 7.07pm was finished.