I've tried to do it with practice. I go to temple every Sunday. Unfortunately, I don't even have a proper space to do this regularly at home, as I live in a 7.5'X13' travel trailer with a 20" wide bed. I cannot sit on the floor, as it hurts even with a pad. It needs to be something as thick as a pad or a bed mattress, which I don't have space for. How do you know I don't have some physiological deformity that prevents this from happening?