The Alexander Technique is a method of muscular re-education, which has become standard training for actors, dancers and singers, and is practised for health reasons all over the world. Its founder, Frederick Matthias Alexander (1869-1955), was an Australian actor who stumbled upon it in the 1890s after studying himself in mirrors to discover why he had lost his voice. He realised that most people suffered from the same postural defects he had noticed in himself, and that this explained much of what went wrong with them. F.M. (as he was known) came to London in 1904 and became enormously...