One Direction ordered onto strict fitness regime

One Direction is set to get even fitter because their music exec bosses have put them on a special fitness programme ahead of their world tour.

The boys will be hitting the road for eight months next year but recent injuries have caused concern.

Niall Horan has dislocated his knee an astonishing 14 times and Zayn Malik has just come off crutches after hurting himself while out partying.

Meanwhile, Harry Styles has a bad back and Liam Payne had a mishap with a computer while in America a few months ago.

'We're concerned about them,' a source told Britain's Mirror newspaper. 'And Liam is still healing after he broke his toe when a MacBook fell on it this summer in the U.S.'

'He never got to rest it as they have been touring and doing promotional work.

'Zayn and Niall have both been on crutches so now they're all on hardcore fitness regimes.'

The hunky boy band's new single, Little Things, is scheduled to be released in December.