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Events like city marathons are increasingly popular. You don't have to be a competitive person to take part in athletics , though you do need to be fairly energetic and reasonably fit. You can build up fitness by jogging. It's not the distance that metters, but how long you jog for. You can improve your performance gradually over a period of weeks. In preparation for a long race like a marathion it's unnecessary to run more than than /*a couple of kilometers most days. Successful marathon runners work on/ psychological aspects of running long races. Mental strength is just as important as being physically fit.