"I joined the Marines, passed Special Forces selection, and became a young leader in the military." — Ant Middleton

When I left the military, I thought I would not have any problems with the transition - I'm very adaptable and very versatile - but I was wrong.

When I was younger, if I got into arguments, I'd become aggressive and violent, but I learnt the hard way that was only going to end negatively.

I was point man, which meant I was the first through the door, hunting down Taliban commanders, knocking down forts every night.

I'm more about mind over muscle. My mindset needs to be the fittest, because it drags my body through whatever needs to be done. A lot of people neglect training their mind and their self-belief, but I believe that's crucial.