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We all know that running a few kilometres each day good for our health, right? Well, what we didn't , until now, is that running too much could bad for us. New research that running long distances regularly for many years could our life instead of it. The study is from the Minneapolis Heart Institute Foundation. Researcher Dr James O'Keefe said too much running can plaque to up inside your heart. This can to heart disease. He wrote: "Years of extreme exercise… to erase some benefits you get from moderate exercise, so that your risk of heart disease, of dying of coronary disease, the same as [an inactive] person."

The researchers at the health and training of 3,300 runners over the age of 35. Seventy per cent of them more than 30 kilometres a week. The study that men who were marathon runners for 25 years 62 per cent more plaque in their heart than men of the same age who did little or no exercise. Another doctor and long-time runner, John Hagan, said he cheated. He has been marathons and triathlons since 1967. He used to up to 60 kilometres per week. He said: "As a physician and a runner, I felt betrayed. I thought I was out there exhausting myself, building an absolutely indestructible heart." Dr Hagan people to regularly but not to things.