Young people exercise for less than 90 minutes in a week on average and around 10% of British kids are obese - which means they're seriously overweight.
A lot of people blame this on kids being more interested in playing computer games and watching TV.
Fergie also reckons there are problems with teachers having to give up their spare time to run school sports teams.
A recent survey showed just seven per cent of kids had played in school sports teams.
Many teachers focus on lessons like English and maths, so PE often gets left out.
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