For a minute, David Moore looks like Christopher Reeve doing the Superman pose. Then he looks like a swan flapping its wings. Then a huge letter A, then a football, then a tree, then the Angel of the North. It’s a bewildering array of poses, but for David these yoga positions have become a part of his weekly routine.
He believes they have banished the back pain he once thought he would just have to live with.
David is 58 and works in an office, and like many who work in offices filled with rubbishy chairs and desks at the wrong height, he has had persistent back pain.