This book is intended primarily for the use of physiotherapy students but may also be of interest to clinical physiotherapists especially those involved in teaching or wishing to update their knowledge. Given that physiotherapy is increasingly becoming a subject of degree status and that many physiotherapy colleges are being affiliated to universities and polytechnics it seemed logical in this edition to shift the emphasis of the book towards those techniques of specific interest to the physiotherapist together with the associated background theory. The more basic physics and electrical theory which was in previous editions dispersed throughout the book has been updated and brought together in the first chapter with the inclusion of quantum physics. The remainder of the book has been thoroughly reorganized and revised. There is also a new chapter on cold therapy and a new section on interferential therapy which is not yet included in the syllabus of the Societys membership exam. This edition also incorporates it glossary.