Thanks James, as it happens I am currently working on a more rounded swing so thats good news. We used to have a soft bed and i used to get a sore back but a few years ago we invested in a posturepedic bed which was alot firmer, it took abit of time to get used to but now I hate sleeping on soft beds, theres no bed like home!!!! Do you have any exercises you would recommend for strengthening the core muscles??