METHODS	Resting SpO2 and the Borg Score were examined at altitudes of 0 or 400 m ( 0-400 m ; 0-1312 .3 ft ) , 1400 m , 4880 m , and 5550 m ( 4593 ft , 16,011 ft , and 18,209 ft ) in 14 military personnel who were part of a climbing expedition to the Nepali Himalaya .\