You must banish this kind of thinking and self talk/self doubt. Your body can be fine tuned and trained to do the work, don't let the working of the devil get in your way!
Self doubt emerges out of our own instinctive desire to self protect. We can actually make ourselves believe that we can't do something, so we don't take the risk and possibly fail.
Take the chance, keep your body strong and your mind even stronger!
congratulations to all that competed this past weekend at the Arnold Classic. This is a picture of me from last year! I hope to return in 2014!