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I'm done with Everest. I did it three times, and I need to be good at that and be happy with it and focus on other climbs.

It takes a lot of resources to climb Everest, and a lot of other people. But you should go do it.

I used to run to school, 10k every day. And this at altitude, perfect preparation, really.

Nothing to mountaineering, just a little physical endurance, a good deal of brains, lots of practice, and plenty of warm clothing.

I can't really do the running on hard ground that I used to do. Instead I go swimming as often as possible.

I never run hills. My quads are already big enough. I don't run to build muscle; I do it for cardio.

If I know I make this much trouble, I never climb Everest.

I have climbed Everest from the Nepal route and the China route. The other routes are too hard for me. So I don't think I can climb Everest again.

I never imagined I could make it to the top of Mount Everest at age 80. This is the world's best feeling, although I'm totally exhausted. Even at 80, I can still do quite well.

I want to get up at 6 A.M. and go swimming and do 30 lengths.