Frequently Asked Questions

Below you will find a list of the questions we are most frequently asked, followed by the corresponding answers. Whether your particular question involves our products, our methods, or the function of this web site, chances are good you’ll find the answer below. If you find you’re still having trouble finding an answer to your question, feel free to contact us through our contact form or at

Can anything be done for scoliosis?


If I sprained my ankle or have foot/arch problems what do I do?

Ice frequently, use a pressure wrap and begin gentle AIS stretching and mild, specific strengthening exercises for each fundamental movement of the ankle (dorsal flexion, plantar flexion), sub-talar joints (inversion, eversion) and specific foot exercises. As range increases and strength improves, the Mattes Ankle Exerciser is a versatile piece of equipment displayed and described in this web site to restore strength and help prevent ankle sprains, shin splints, foot problems, etc. Use of the Mattes Ankle Exerciser and other specific foot exercises, using a towel, stocking and resistive weights are employed successfully for foot problems and arch development.

How do I stretch my calves?

Traditionally the calves are stretched from the standing position by leaning against a supportive wall, fence, etc. The main problem is the gastrocnemius (calf) muscle, which is stabilizing the knee and ankle joints. When leaning forward the calf muscle is performing a lengthening contraction to stabilize both joints and is not a relaxed muscle. The best stretching position for a relaxed calf is performed in a sitting position. Place a rope or strap around the ball of the foot. Keep the knee straight. Lift the foot and ankle backwards and assist with a rope. For greater specificity turn foot inward 20 degrees and lift the ankle back to stretch outer belly of calf. Next turn the foot outward 20 degrees and pull ankle back to stretch inner belly of calf. As the calf becomes more flexible, lean the upper body forward 15-20 degrees to provide greater stretch potential.

How do I stretch my hamstrings?

The hamstrings are best stretched when incorporating the quadriceps. Use of a rope or strap is helpful. The distal end (insertion) of the hamstrings should be stretched before the proximal (origin) end. The “Bent Knee Hamstring Stretch” is used to stretch the distal attachment. To become more specific the lower leg is first rotated inward to stretch the distal inner hamstrings. Rotate the lower leg outward for the distal outer hamstrings. Incorporate the “Straight Leg Hamstring Stretch” for the muscle belly and proximal attachments. The Knee must remain extended. Use rope or strap to assist. After initial straight leg stretch, perform movement with full leg rotated inward for oblique fibers of inner hamstrings. Rotate leg outward and move leg toward opposite side shoulder to isolate oblique fibers of biceps femoris (outer hamstring).

Is there any way to prevent carpal tunnel? Can carpal tunnel be relieved without surgery?
Prevention of carpal tunnel involves specific stretching for the neck, anterior shoulder/chest muscles and the radioulnar, wrist and hand muscles. AIS has been used by thousands of secretaries, computer personnel and people who do repetitive movements. During the past 32 years thousands have been relieved from carpal tunnel symptoms without surgery by employing specific AIS stretching and strengthening programs.

What about low back problems?

Most low back problems stem from a couple of different areas. One area that attributes to low back problems are weak abdominal muscles. Many people with low back problems have very under developed abdominal muscles and also low back muscles. It is important to work to build up the abdominal muscles using abdominal crunches or half situps also pelvic tilts. The strengthening book “Active Isolated Strengthening” goes into great detail working with the low back and abdominal muscles. Also tight hamstrings attribute to many problems associated with the low back.

Can stretching help my golf game?

Stretching is a very important part of golf to not only prevent injuries but also to improve the power exerted in golf. Golf is a power sport, which means the greater the amount of strength or power you can exert with the golf club to the ball, the greater the velocity the ball will travel with or farther you can hit the ball. Power is the amount of strength you can exert over a great range of motion divided by time. What this means is if you can take the strength you already have and use it through a greater range of motion, this will allow you to achieve a greater power potenetial. Most golfers who are known as “long ball hitters” are able to acheive greater motion on their back swing and range of motion in the hips on the torso region to achieve greater power on the active swing motion. So flexibility is a intrical part of golf. Increasing your flexibility will also help to prevent injury on the deceleration phase of the swing as well. If the muscles are more flexible, when the shoulders, arms and torso have to decelerate the swing, there will be decreased chance of injury.

Is stretching important for runners and walkers?

Running and walking are very strenuous activities on the body. The exercise effects almost every aspect of the muscular skeletal system from the feet to the neck. Using Active Isolated Stretching you will actually warm the muscles, joints and fascia of the body preparing it for running or walking. Proper preparation for your activity will not only help to decrease the chance for injury, but also to slow the process of fatigue. the more flexible the body is the more efficient it can be. If the body is properly warmed up, the body’s cardiovascular system is able to better oxygenate the muscles decreasing the rate fatigue or lactic acid will set in. Stretching will also help to remove or decrease fatigue after running or walking by pumping the lactic acid from the muscles thus removing the toxic material from the muscles that cause them to be sore.