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Robbie Savage and Alan Shearer going head to head in a challenge for Sport Relief like no other: The Battle of the Backsides.

The challenge will see the pair frantically race to be the first to sit on half the seats in the iconic Wembley stadium - a brutal 45,000 seats each – that’s a hard-core session of squatting and sliding. They have five days to complete this physically demanding feat – the first time a challenge like this has ever been attempted in the UK and it’s all to raise funds for Sport Relief.

Kick-off is Monday 10th March at Wembley Stadium and the final whistle will be blown on Friday 14th March, when they hope to be the first to reach the prestigious Royal Box.

The repetitive nature of this challenge means that with 45,000 repeats of the same movement continuously, the pair’s quad and glut muscles will take real punishment – with their ability to manage pain and stiff muscles the key to beating their opponent. On top of that blisters and sores on the hips, bum and groin are a real possibility that could plague the pair during this challenge.

The competition

To support them in this brutal task, as well as be in with the chance to win some amazing prizes, you can enter a competition at (please note: you must 18 or over to enter, and you will be directed to an external website. The ±«Óãtv is not responsible for content on external sites).

Each competition entry costs £5, and there are some incredible prizes up for grabs including tickets to see England play at the 2014 World Cup in Rio, a day at the Wimbledon Championships or tickets to One Direction on their UK tour. There’s a limited 90,000 entries available to represent the number of seats collectively sat on during the challenge.

Alan and Robbie are putting their bottoms on the line in the hope of raising a lifesaving sum of cash to help change the lives of vulnerable people in the UK and around the world.

Aiming to keep morale high during the week, Alan and Robbie will be joined by some of their favourite famous fans and celebrity mates.

Fans can follow all the action from Wembley over the five days with regular updates on ±«Óãtv Radio 5 live and .