What is AIS?

Janet educates a client on AIS hamstring stretch.

AIS stands for Active Isolated Stretching, a modality developed by Aaron Mattes.  For the past two decades, experts in the athletic training field have advocated prolonged stretching for up to 60 seconds.  However, research has found that prolonged stretches greater than 5 seconds actually inhibit blood flow within the tissues and create lactic acid build up.  AIS method of fascial release provides dynamic facilitated stretching of major muscle groups. Performing an Active Isolated Stretch for no more that 2 seconds allows the muscle to optimally lengthen without triggering the protective stretch reflex and subsequent reciprocal antagonistic muscle contraction.

Active Isolated Stretching

Active Isolated Stretching, The Mattes Method, is a continuation of Aaron Mattes’ contribution to the science of kinesiology and its practical application.

AIS is not only a modality performed as an assisted stretch with a patient but just as importantly, taught to the patient as a self-help method of pain relief. Sessions last from 1-1.5 hours, and consist of assisted stretching, strengthening and self-help education.