Afferent input


At Muscle IQ we strive to help our patients return to an active life after an injury or accident.  To achieve this we use a system of evaluation and treatment that is called The Afferent Input Solution. This method focuses on the idea that weakness is the problem, and fixing weakness is the most important step for health.

Pain is commonly the result of weak muscles.  Weak muscles lead to pain, and strong muscles protect.  Dr. Howard Knudsen and Dr. Chris Knudsen are Afferent Input Practitioners.  They have received training specifically for muscle testing to find weakness, identify the cause, and fix the weakness, using the Afferent Input method.


"If you want to return to an ACTIVE LIFE you need STRONG MUSCLES!" -Dr Chris Knudsen

Every muscle in the body is controlled by reflexes and sensory inputs.  A muscle can become weak when it is not receiving the right inputs from the rest of the system.  An injury can lead to protective reflexes that will turn off a muscle or decrease the muscle contraction.  At Muscle IQ we test to see what muscles are weak. We test to see what area of the body is causing the weakness.  Treatment to the correct area can cause an immediate change in the contraction of the weak muscle, restoring normal input and normal output.  

What is the key to strong muscles?

We are consciously aware of the five senses:

  • Sight

  • Sound

  • Taste

  • Touch

  • Smell

Our muscles work off of sensory input.  They receive input from other muscles, tendons, fascia and also input from the spinal cord.  Most of our muscle activity is unconscious, and is controlled by reflexes.

Myotatic Reflex (Knee Jerk Reflex):

Jump off a chair and your legs catch you.  Your muscles respond reflexively to the forces placed on them.  Your muscle contract at appropriate levels in response to new forces.  This is often called the knee jerk reflex, like when a doctor hits your knee with a reflex hammer.  This reflex occurs automatically without conscious effort.

Withdrawal Reflex:

Touch a hot plate, or step on a tack, and your muscles will reflexively protect you by withdrawing.  This reflex overpowers the Myotatic reflex. If you jump off a chair and land barefoot on broken glass your leg muscles will not catch you.  You will crumple and fall to the ground as your body tries to withdraw from the painful stimulus. This reflex causes a weakening of specific muscles.

Some bodily injuries act like a tack or a hot plate.  These injuries trigger a withdrawal reflex, causing a muscle to become weak, in order to protect the injury.


It is very common for muscles that have not worked right for a while to be deconditioned.  Our treatment programs always include exercises to help recondition these muscles. Exercise should be pain-free.  The right resistance is important. If an exercise hurts it can turn the muscle off again.


What do our patients say about Muscle IQ and fdm?

"The staff at Muscle IQ are wizards! Chris Knudsen and his team healed me! Its been almost a year since I've done the "facia" therapy they offer, I'm still using the stretches and education I received there and its sustained my shoulder. The staff is helpful and patient. I feel like they concentrated the time so every session I was able to notice progress and get stronger. It was a painful recovery but so worth it muscle IQ was there for me every step of the way. I liked the strengthening machines that recorded my progress it was encouraging to see the results. I recovered 100% of what I had before the accident and more thanks to Chris."

- Diane