Sports shoes that work out whether their owner has done enough exercise to ensure time in front of the television have been invented in the prefix = st1 /UK.  The shoes--dubbed Square Eyes - contain an electronic pressure sensor and a tiny computer chip to record how many steps the wearer has taken in a day. A wireless transmitter passes the information to a receiver connected to a television, and this decides how much evening viewing time the wearer deserves, based on the day's efforts.   The design was inspired by a desire to combat the rapidly ballooning waistlines among British teenagers, said Gillian Swan, who developed Square Eyes as a final year design project at Brunel University in London. " We looked at current issues and childhood obesity really stood out," she told New Scientist. "And I wanted to tackle that with my design.   Once a child has used up their daily  _ gained through exercise, the television automatically switches off. And further time in front of the TV can only be earned through more steps.   Swan calculated how exercise should translate to television time using the recommended daily amounts of both. Health experts suggest that a child take 12,000 steps each day and watch no more than two hours of television. So, every 100 steps recorded by the Square Eyes shoes equals precisely one minute of TV time. The best title for the passage might be  _  .
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