Question

why do mountaineers experience problem in breathing while climbing at high altitudes? ​

Answer 1

Answer:

Oxygen availability and altitude

Although the percentage of oxygen in inspired air is constant at different altitudes, the fall in atmospheric pressure at higher altitude decreases the partial pressure of inspired oxygen and hence the driving pressure for gas exchange in the lungs.

Answer 2

Answer:

Yes they have problem of breathing if their o² tanks are not properly connected otherwise they have no problem