Abstract: Apparatus for use in measuring the muscle tone of a muscle comprising a force applying assembly operable by a user to apply variable forces to a muscle to effect displacements of the muscle in accordance with the amount of force applied, transducers for detecting the amount of force being applied to the muscle and the muscle displacement caused by such applied force and for producing force and displacement signals, electronic circuitry for deriving from a number of force displacement signals produced within a linear elastic region of force/displacement curve to produce a muscle tone measurement, and a display for displaying the muscle tone measurement.