Sport and exercise A lot of people are worried that today's British teenagers don't get enough exercise Today, less than half of teenagers play team sports, compared to more than 75% in the 1970s. More than 80% of teenagers in the UK now prefer watching sport on TV to actually playing it More than half of teenagers agree that young people are getting fatter, lazier and more addicted to computer games They want to play sports, they say, but a lot of local parks and sports centres are closing New gyms are opening, but they're too expensive for most teenagers