They suffered from altitude sickness while climbing the mountain.
Они страдали от горной болезни, поднимаясь на гору.
Definitions
Altitude sickness, also known as acute mountain sickness (AMS), is a condition that occurs when a person ascends to high altitudes too quickly, leading to symptoms such as headache, nausea, dizziness, and fatigue due to reduced oxygen levels in the atmosphere.
