People think I'm mad, but on my days off in Chamonix I go bouldering and running. This is me relaxing last summer

It's difficult to maintain power and strength at altitude, because movement tends to be much slower. Even though I'm fully acclimatised, my clients have usually arrived fresh from UK.

So, if we get to an overnight hut in good time - it's not unknown for me to have a quick run down to the valley and back to stretch my legs!