Whether you are an elite athlete, a patient in rehab for an injury, a weekend warrior, or a
stay at home mom, Active Isolated Stretching (AIS) will enhance all aspects of
movement no matter what activity you choose to participate in.
For an impressive list of pro athlete testimonials, please see the web
I was introduced to the AIS technique about 20 years ago. When I was in school, it was
a cursory two-day course in stretching that I felt would be of benefit to me in my daily
work and activities. Little did I know the change it would bring to my life and career.
Within ten days of performing the stretches, I had eliminated a rotator cuff injury that
had persisted for years, as well as many other injuries since. I was amazed at how
quickly these movements changed the structure and function of my shoulder and as a
result, I decided to learn this technique from the man that created the work, Aaron
Mattes RKT, LMT, from Sarasota, Florida.
Aaron, a registered kinesiotherapist and rehabilitation specialist, has been teaching AIS
for decades, and has his own clinic in Florida. I have spent many years working closely
with Aaron at his clinic and at countless seminars, assisting him in teaching the next
generation of therapists that will carry on this work.
With over 20 years experience, many of which were in the physical therapy setting, I've
applied AIS to thousands of my patients, athletes, and clients.
I can honestly say I have never had anything but positive experiences using AIS. Simply
put, it just works.
How Does Active Isolated Stretching (AIS) Work
So how does AIS differ from the myriad of modalities available for aches, pains and
greater athletic performance?
There are three main principles of AIS that will help you understand this method of
First, active isolated stretching uses your body's own laws to facilitate the results I am
speaking of. The stretches are held for only 1.5-2 seconds, and are completed in
The reason for this is that when a stretch is held for longer than two seconds, a
protective mechanism called "myotatic stretch reflex" is triggered. This reflex happens in
your body under many normal circumstances. However in elite performance, injury
rehabilitation or the desire to instill lasting changes in the body, this reflex is
The aforementioned is true because when the myotatic stretch reflex is initiated (by
holding stretches for more than approx. 2.5-3 seconds), the muscle being stretched will
begin to contract, creating what is known as an eccentric contraction - something we do
not want to happen.
Allowing the myotatic stretch reflex to occur while stretching causes oxygen to be
depleted from the tissue being stretched. Reduction of oxygen is the opposite of what
you want to happen in a rehabilitation or performance situation.
Secondly, the stretches performed in this technique are "active"-- meaning the person
being stretched actually helps move their own body part with their own muscles, before
any assistance with a rope (if done alone) or a therapist (if treated by a therapist) is
This active movement causes "reciprocal inhibition" (Sherrington's law). Simply put,
when a muscle contracts, another muscle called the "antagonist" (the opposite) muscle
is shut off.
The perfect environment to stretch a muscle is when it is relaxed. Active Isolated
Stretching achieves this concept with every stretch.
In this concept, I am speaking about optimizing the oxygen content of the muscle and
surrounding fascia (connective tissue). You should always be exhaling during the " work
phase" of the stretch, or while the myofascia is being stretched.
Breathing in this manner will allow the maximum amount of oxygen to be delivered to
the region being treated. This is the optimal result desired, whether it is for athletic
performance, rehabilitation, or just preparing yourself for your day.
Additional Benefits of AIS
There are several other benefits that occur by using AIS.
Because your brain and nervous system are engaged in every movement, there is
neuromuscular re-education occurring as the repetitions are done. Every time a new
range of motion is achieved, new neural pathways are produced.
For athletes, Power= Strength + Flexibility + Time.
A muscle cannot be trained to its end range if a maximum range of motion is not
achieved. By using repetitions, great amounts of lymph are moved through your body.
This is of great benefit in wound and injury healing, as well as detoxification of your
Additionally, the benefits of AIS can result in an enhanced immune system, as well as
improved feeling of well-being because of increased flexibility.
There are many reasons to be or become flexible. Your daily activities will be enhanced
by having a more supple, movable body. Personally, I find it to be the most critical
aspect of well-being. If you cannot move well, all activities, fitness endeavors, strength
training, and general health can be compromised.