Carstensz Pyramid - Training & Fitness Spend as much time as possible training ‘on the hill’ and carrying a pack as possible. Combine this with a comprehensive strength and aerobic training programme to strengthen your CV system and your core. Interval and endurance training will help prepare your body for exertion at altitude. If you’re not a regular rock climber, schedule some sessions at your local climbing wall, aiming to climb routes in your mountaineering boots if possible. Outdoor scrambling and/or rock-climbing days in the UK should be included in your training programme. You can find out more about how to prepare for high-altitude here.