Professional Applied Kinesiology (PAK) is a diagnosis technique used by chiropractors to gage the integrity of the nervous system. PAK uses specific muscle testing to evaluate the whole body system. PAK assists in the process to find the reason behind functional disturbances in the body and proposes a direction for correction.

Health comes down to a combination of chemical, structural and mental factors that affect the body. All systems must be in balance, with PAK being able to identify issues in the body as a whole.