Blocking your kids' access to TV and the computer could help them shed weight, an experiment with 70 overweight children showed.

The results of the study, published in the current issue of Archives of Pediatrics & Adolescent Medicine, involved children aged 4 to 7 years whose body mass index (BMI) was at the 75th percentile or higher for their age and gender. All of them regularly watched television or played computer games for at least 14 hours a week at home. That doesn't even sound like a lot compared with some of the habits...