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25 November 2013, 12:15
The 'What Makes You Beautiful' stars talk about the need to stay in shape for their tour in the clip.
One Direction can be seen showing off their gym routine as they flaunt their impressive physiques in a new behind the scenes video.
The group have been on the road for much of 2013 and Liam Payne tells the camera how important it is for the boys to stay in top shape to endure their hectic touring schedule.
They recently wrapped up their 'Take Me Home' world outing and will embark on their first stadium tour in 2014.
Harry Styles takes to the weights, Liam Payne gets boxing and Niall Horan takes part in some stair jumps during the new footage.
Meanwhile, it was 1D Day this past weekend, as the group took part in a special seven hour streamed event for their fans.
They were also seen taking home two prizes at the American Music Awards 2013 as well as performing new single 'Story Of My Life'.
Their new album 'Midnight Memories' is released today (25th November).