I`m interested in sport, especially

I`m interested in sport, especially athletics, and I run seven or eight kilometers everyday. I particularly enjoy cross-country running, where you have to run across fields, jump over streams or so on. While I`m running I think about all sorts of things, and at the end of a run I`m sometimes surprised to find that I`ve managed to solve a problem that was on my mind.
Next year I`m going to try the London Marathon. It`s a long, hard race - 26 miles, or 42 kilometers - and you have to be tough to finish, but I very much want o do it. I worry a bit about getting old, and I`d like to prove to myself that I`m still almost as fit as I was twenty years ago.
I`m interested in mountaineering as well as running. I`ll never become an expert climber, but I know what I`m doing in the mountains. I successfully completed a course in snow and ice climbing when I was younger, and I`ve done a series of easy climbs in the Alps during the last few years. My wife doesn`t share my interest in mountains. She agreed to go climbing with me once, but she found that she felt ill as soon as she got above 1,000 meters.