Kinesiology, also known as biomechanics, is the study of body movement. Applied kinesiology (AK) which is also know as muscle strength testing, is a method of diagnosis and treatment based on the belief that various muscles are linked to particular organs and glands, and that specific muscle weakness can signal distant internal problems such as nerve damage, reduced blood supply, chemical imbalances or other organ or gland problems. Practitioners contend that by correcting this muscle weakness, you can look to address a problem in the associated internal organ.