Share Facebook Twitter LinkedIn Email Telegram WhatsApp An early phase of a training program focused on building endurance and aerobic capacity through lower-intensity, longer-duration workouts. Related Articles: Prehab for Mountaineering TrainingTraining for Mountaineering: StrengthTraining for Mountaineering: Base TrainingTraining for Mountaineering: Climbing Specific PeriodMaking the Most of Your Uphill Athlete Training Plan