The secret with hill running is to take short sharp steps.
I remember our troop stripey in Norway once. We were herringboning up the side of a mountain that seemed to go on for ever. The pace was fast and by the time we got to the top we were breathing like obscene phone callers.

Then I looked at our stripey, an ML, who was leading the way, he was just a few feet away from me. When we reached the top, I heard him whisper to himself under his breath. "Arrrhgg, better than a bag off."
Typical ML. LOL
Cheers
Steve