A very important and (according to me) fun part of the preparations for the expedition is training hard.
Of course I do climb ...
... but most time training I spend on the road bike, mountain bike and with my running shoes on.
Actually endurance and interval training are the most important for a mountain objective like this. I really like to do sport outdoors, so to be honest climbing indoors in gyms (back home in the Netherlands) is not my favorite training.
I like cycling and running a lot. This winter and spring I did quite some running competitions which went quite well. Now I also spent a lot of time on the roadbike and mountainbike and hurt my legs during interval training and when sprinting.
During several weeks I have been rock climbing. Furthermore I trained my ice climbing skills in the Italian Alps this winter.