Less television to limit coronary heart disease?
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Less VT, less coronary heart disease?
A recent study funded by the University of Hong Kong School of Medicine suggests that if we all watched TV for less than an hour a day, we could prevent up to 11% of cases of coronary heart disease such as heart attacks or strokes.
Thanks to data from the UK Biobank (a British database that aims to study the environmental or genetic factors of disease), scientists have determined in more than 500,000 adults followed for about twelve years genetic risk scores for the development of a disease. these genetic risk scores with time spent in front of the small screen. those who watch television for more than four hours a day are at greater risk of coronary heart disease, This is it regardless of your initial genetic risks – or other known risk factors. On the other hand, those who watch two to three hours a day have a 6% lower risk compared to these heavy users, and those who watch for less than an hour, a 16% lower risk.
Assuming causality, it could be that 11% of coronary heart disease can be prevented if each of us watches television for less than an hour a day. as Dr. Katrien Wijndaele from the Epidemiology Unit of the Medical Research Council of the United Kingdom (MRC), lead author of the study, explains: “ Although it is not possible to say with certainty that sitting watching television increases the risk of coronary heart disease, due to several potential confounders and measurement error, our work supports the WHO guidelines that recommend reducing the number of sedentary behaviors and replacing with activity physical activity of any intensity, in order to stay in better health. »
Is the computer much less harmful than television?
Most surprising result of this study, the computer does not seem to have the same impact on our health. In fact, the researchers also looked at time spent behind the computer during leisure time and did not see a television-like effect.
As television is usually watched in the evening after dinner (which is often also the most caloric meal), it is speculated that it could generate higher levels of glucose and lipids, such as cholesterol, in the blood. Likewise, television is often associated with snacks, as opposed to time spent browsing the web. Finally, tasks performed behind a computer are often more likely to be interrupted, as television often leads to long hours of passivity.
Misuse of screens during meals
Nature, yes, but no portable screen
“Genetic susceptibility, screen-based sedentary activities and incidence of coronary heart disease”, BMC MedicineMay 2022.
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