Give 200 pre-teens in London pedometers to count how many steps they walked - and guess what happens. As part of a study into obesity, 11- and 12-year-olds were required to clip a pedometer to their waists. Researchers were surprised by the activity levels recorded in some obese children. Further investigation revealed some had attached their pedometer to their family pets. Guess you have to credit their ingenuity. Full story on the BBC site.