More than one in 10 cases of coronary heart disease could be prevented if people reduced their TV viewing to less than an hour a day, research suggests. From a report: Coronary heart disease occurs when fatty material builds up inside the coronary arteries causing them to narrow, reducing the heart's blood supply. Researchers say cutting down on time spent in front of the TV could lower the risk of developing the disease. "Reducing time spent watching TV should be recognised as a key behavioural target for prevention of coronary heart disease, irrespective of genetic susceptibility and traditional risk markers," said Dr Youngwon Kim, an assistant professor at the University of Hong Kong and an author of the research. While the team did not look at what was behind the association, Kim said previous studies had found excessive TV viewing time is associated with adverse levels of cholesterol and glucose in the body. "Unfavourable levels of these cardiometabolic risk markers may then lead to increased risk of developing coronary heart disease," he said. Writing in the journal BMC Medicine, Kim and colleagues report how they used data from 373,026 white British people aged 40-69 who were part of an endeavour known as the UK Biobank study.

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