Marc Wyatt from South Molton has joined more than 450 people to sign up for the commando-style obstacle course, set over 10km of punishing terrain on Sunday, October 14. Marc, 36, had his leg amputated above the knee at age seven because of a birth defect, but he says he has lived with it for so long he hardly thinks about it. He said: I first decided to sign up for Mission:Unbreakable because I saw it as a fun way to challenge myself, while also raising money for a fantastic local charity. I take part with my wife and a team of clients from our fitness business, StudioActive. Weve taken part every year since the very beginning and I think it is important to show that no matter what we think may be holding us back, we can overcome it with the right attitude and determination. The event, with headline sponsor Toller Beattie, involves 10km of mud, marsh, rivers and gruelling obstacles, supported by 24 Commando Engineer Regiment at RMB Chivenor. But Marc says it very much encourages camaraderie over speed: Our team is always made up of mixed abilities, and the thing we like best about Mission:Unbreakable is that it encourages you to work together and encourage each other along. There are plenty of challenges for everyone regardless of ability. Its great fun and there is a real sense of achievement when you cross that finish line. Marc and his partner, Hazel, have four children and as well as running their own personal training business, he is also an amputee footballer who has represented Great Britain. He hopes his story will encourage others to join him and sign up to Mission:Unbreakable. He added: There will be people sitting at home thinking that they could never take on a challenge like this, but life is all about overcoming hurdles. This event is so much fun and the feeling you get at the finish is incredible. So please join me and sign up today. Mission:Unbreakable takes place on Sunday, October 14, with the event HQ at North Molton Sports Club. Sign up now at www.missionunbreakable.co.uk.