The Technique of Travel : Page 124

Resting.—Skiers sometimes fail to realize they are overtiring themselves; more often they are reluctant to admit it, and will press on, subjecting themselves to the hazards of fatigue. The ill-effects of such a tendency are threefold: (1) In tiring himself, the skier loses skiing proficiency, and is more apt to fall and injure himself. (2) The person who is fatigued is predisposed to freezing. (3) The party that goes the limit of its endurance in good going has no margin of safety left when an emergency arises. One may experience a feeling of self-satisfaction at playing the iron man, but such heroics are better saved for the practice slope. On a ski-mountaineering trip, just as in a military campaign, the man who gets injured is a hazard, no matter how much sympathy he may deserve.