Katie Price thinks she let herself down on \'Celebrity SAS: Who Dares Wins\'.
The 41-year-old former glamour model - who underwent breast reduction surgery prior to appearing on the show - has admitted her body was not ready for the gruelling challenges organised by Ant Middleton and his team.
Katie said: "I think a lot of people would know that mentally I am strong, just by my past and what I have been through...
"But it it was just physically my body wasn\'t ready for a lot of the things I was put forward to, because that\'s just due to my stupidity of going smaller surgically.
"But apart from that I am a strong person anyway. When you get an interrogator going at you, even thought you know it is fake, although it is a show, it is not supposed to feel like a show. It feels like reality."
Despite this, Katie thinks the show helped to improve her overall mental health.
She shared: "I was going through a bad time mentally before I did this show.
"You will all find out what was going on. Since doing the show, for my mental health and stuff, being fit, I am actually so much fitter now than when I did the show."
However, Katie still feels as though she let herself down.
She said: "My only big thing is that someone else had been offered the place instead of me because I feel like I let myself down.
"What I mean is because of my boobs physically - you will see some of it - that I shouldn\'t have done it. I lied to myself.
"But since the show it has made me think ... I am much fitter now that, if I ever got that chance again, I would love to do the show again."