TV makes us big, the study shows

The overweight adult could burn more calories if they watched less television, according to a study published in the journal Archives of Internal Medicine.

Participants in this study that halved the time spent watching television have become more active and spent an average of 120 extra calories per day.

Researchers at the University of Vermont (Burlington, United States) recruited 36 adults for this study. The latter claimed to watch television for at least three hours and on average five hours per day. They had a body mass index (BMI) between 25 and 50.

The first group consisted of overweight people, with the body mass index between 25 and 29.9, and the second group (obese people), with a BMI of 30 or more.

Having monitored the participants for three weeks, the researchers asked twenty random participants halving the time spent watching television for three weeks.

The remaining 16 participants continued to watch TV as usual. Both groups reduced their energy intake: 125 calories per day for the group having spent less time watching television, and 38 calories per day for the other group.

The group that has reduced the time spent watching TV has increased its energy expenditure for 120 kilocalories per day on average, compared to a decrease of 95 kilocalories per day on average for the other group.

Average adult Americans spend on average five hours per day watching television. Watching television would be the third most practiced activity in the United States, behind the time spent for sleeping and working.

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