Revolved Trikonasana is my least favorite pose. There, I said it. As a teacher I try not to share my opinions of poses so my students can decide for themselves with no influence what a pose is like in their own body. When it comes to this pose, though, I must admit, I cannot hide my distaste. My body in this pose feels like fingernails on a chalkboard.
We all have beliefs about our bodies. (And beliefs, by the way, are just an opinion, a thought, that we have held for a very long time.) We may see ourselves as flexible, tight, injured, weak, strong, unable to go upside down, unable to balance, etc. My guess is if you sit for a moment you will come up with half a dozen beliefs you have about your own body. What is most interesting about our beliefs is others usually see through them before we do. And, as teachers, we often see that our students are capable of so much more than they think they are.