Applied Kinesiology (AK) is a practice of using manual muscle-strength testing for medical diagnosis and a subsequent determination of prescribed therapy. It purportedly gives feedback on the functional status of the body.

Applied kinesiology is a system that evaluates structural, chemical, and mental aspects of health using manual muscle testing alongside conventional diagnostic methods. The essential premise of applied kinesiology that is not shared by mainstream medical theory is that every organ dysfunction is accompanied by a weakness in a specific corresponding muscle, the viscerosomatic relationship. Treatment modalities relied upon by practitioners include joint manipulation and mobilization, myofascial, cranial and meridian therapies, clinical nutrition, and dietary counseling.