42 Lower Kings Road, Berkhamsted Herts HP4 2AA
Simon King

Simon King

Over 30 years Simon King has developed a deep and unique understanding of the importance of muscle reflexes and muscle strength in the maintenance of a healthy and pain-free body. He uses innovative treatment strategies to help patients become stronger and healthier so they can exercise and live without fear of illness or injury.

Did You Know?

Nerve messages that go TO the brain are called AFFERENT (towards), while those that come FROM the brain are called EFFERENT (away from).

Simon King is an expert in Afferent Input and using Afferent Input to treat and prevent musculoskeletal injuries.

Over thirty years in practice, Simon has always strived to understand the true origins of disease and ill health. Fascinated by muscle testing and the connections between nerves and muscles, he set about learning all he could about Applied Kinesiology and eventually became a diplomate of the ICAK in 1996. He has gone on to teach hundreds of practitioners the principles of Proprioceptive Medicine and Afferent Input.

Simon is available Mondays, Wednesdays, Thursdays and Saturdays. His specialties include sports injuries, sports performance enhancement, chronic pain and disability.



Muscle Testing

Naturally Strong and Pain Free

Bumps, bruises, sprains and sprains – Minor injuries are part of life. Our body usually heals the damage and restores us to normal.

Sometimes, it doesn’t. Some injuries become chronic, persistent and disabling.


Many patients spend thousands of pounds visiting dozens of practitioners and specialists looking for an answer that eludes them all.

The good news is that for most of these patients, there is a solution.

The culprit is usually hidden muscle weakness.

Some people have a body that is compromised.

They have MUSCLE INHIBITION, a condition not usually recognised by modern medicine, conventional or alternative.

While exercise is a popular treatment for weakness, it doesn’t solve inhibition. If it did, top athletes wouldn’t end up needing spinal surgery or hip replacements.

Messages from the spinal cord control muscle tone. Even at rest, every muscle fibre is receiving 50 messages a second – at full contraction, it’s 500 times per second.

The only way we can move properly is by constantly balancing and coordinating every muscle contraction with every other muscle contraction.

Balanced muscle tone is too complex to be processed by the brain, so we use spinal reflexes. This means that most of our movement can occur without conscious attention. We might initiate a movement (jumping off a chair) but landing will be mostly automatic.

If something inhibits our muscles, we are vulnerable to injury. Those injuries may not heal if the inhibited muscle can’t stabilise the injured joints, so the injury becomes chronic or recurrent.

Fortunately, muscle tone can be assessed and corrected by a suitably trained practitioner. Once normal muscle tone is restored, patients suffer little to no pain and recover quickly from illness and injury.

Simon King has been training chiropractors, osteopaths and physiotherapists to assess muscle tone for over 20 years. He is an expert at restoring normal muscle tone so his patients can live more powerfully.

Whether you want to heal a pain, restore a movement or excel at sport, a comprehensive muscle testing examination followed by appropriate treatment could be just what you’ve been looking for.

Simon King teaching chiropractors, osteopaths and physiotherapists at a Recent Seminar

You don’t need to be an award-winning sportsman to benefit from Afferent Input. The tiniest imbalance in our bodies can cause chaos and can be traced back to anything from old fillings to an undiagnosed hernia.

Arram Eghoyan – Strongman and Personal Trainer

See the Results of Afferent Input

for yourself
Low back pain solved by identifying a tooth problem
Low back pain solved by identifying a piercing problem
More strength from removing a piercing

Make An Appointment

Initial Consultation, Examination and Treatment £150 (allow 45 mins)

Follow-up Examination and Treatment £75 – £50 (allow 30 mins)

More about Simon

Simon grew up in New Zealand and had his first chiropractic treatment after falling off a chair at the age of six. That early treatment seemed to end his prior need for weekly blood tests that were searching for the origin of a “leukaemic-like” condition and ironically, low muscle tone. At the age of 14, the chiropractic philosophy that the body would look after itself if the nervous system was working properly seemed so appealing that he chose this as his future career. Simon also took up bike racing and made the NZ cycling team at the age of 17, competing in road and track events in New Zealand and Australia, including the Empire Games in 1980, which has given him an invaluable insight into the impact of sports injuries.


He started his chiropractic studies at the RMIT (then PIT) in Melbourne, being part of the first ever government-funded chiropractic course. He practiced for two years on the Gold Coast in Australia before taking up a teaching post at the Anglo-European College of Chiropractic in Bournemouth, England before setting up two large clinics in Retford and Grantham.

As his practice developed, he became fascinated by the fact that certain patients responded to treatment while others did not, and the difference could not be explained by current medical knowledge, so he studied and became proficient in Applied Kinesiology, a system of diagnosis based on manual muscle testing and became a diplomate of the International College of Applied Kinesiology in 1996.

The theory that became Afferent Input grew out of his desire to understand the facilitation and inhibition that are fundamental to Applied Kinesiology. He has been teaching Afferent Input to health professionals for 20 years and is currently practicing in Berkhamsted, Hertfordshire.

He is the founder of the Association of Afferent Input Practitioners, a growing group of health professionals putting afferent input to work in their practice.

Make an Appointment

Simon is available Mondays, Wednesdays, Thursdays and Saturdays.

His specialties include sports injuries, sports performance enhancement, chronic pain and disability.


In my mid 50s and fairly sporty – I developed a hip ache, aching joints, discomfort in my foot, pain when kneeling and various other “niggles” which physiotherapists and my osteopath couldn’t find a long term fix for.
My Yoga instructor suggested I visit this clinic and saw a kinesiologist. I googled it initially and had it not been for the recommendation from her I would have been put off by the on line video of kinesiology in practice as their appeared to be very little “hands on” treatment. However, the result was astonishing!
After the first half an hour of treatment I skipped out of the clinic without foot pain, was diagnosed and treated for thyroid problems (who knew?) had a hernia sorted out (again, a surprise to me) and my hip pain totally disappeared. Since then I’ve had one more visit after having a mercury filling removed from a tooth to finalise all the corrections and complete the treatment and feel better than ever.
I realise now that just because we’re getting older we should not accept aches and pains as a natural progession of ageing! I now have a three month maintenance check up to ensure everything is working correctly and prevent future potential problems from developing. Worth every penny. –


I went to see Simon King at the recommendation of my son whose RSI had been dramatically eased after two Kinesiology treatments following 3 years of pain every day. The improvement continues to hold after 5 months. My problem is with arthritic knees. Xrays show they reveal “severe degenerative change”. Simon used Kinesiology (muscle-testing) to test the strength of my muscles explaining that they were not strong and not holding my skeleton in the right alignment so bones were rubbing against bone. He discovered the calcium I was taking prescribed since my hip replacement was not particularly good quality and was not being absorbed into my bones. He advised a seaweed based one which was not particularly expensive. I found Simon to be concerned, knowledgeable thoughtful and very skilled and hope he may be able to help me avoid a knee replacement operation.


“Hi Simon
Just a quick line to let you know that my mum, Maureen, had her metal crowns replaced with pure porcelain ones and I’m happy to report she is migraine free. She’s buying your book for her dentist who is very curious. She has to watch out for a little sensitivity on one front tooth, but sensitive toothpaste seems to take care of that. 15 years of pounding migraines that derailed her life, fobbed off by doctors as over anxious, dogged by crushing pain, and she’s pain free!
Rebecca, Shropshire”


Simon's articles

Osteoarthritis of the hips

The Most Important Tests for Low Back Pain

X-Rays and MRI scans are popular tests for low back pain but they may not be the best tests for an accurate diagnosis.
Read More
Osteoarthritis of the Knee

The Best Tests for Knee Osteoarthritis

It's easy to find the cause of osteoarthritis when you use afferent input muscle testing. Find out how it works.
Read More
Osteoarthritis of the Knee

Why You’re Still Hurting

If your pain has lasted more than 3 months, or if there are certain movements you can’t do any more, it’s important to have your muscles checked for inhibition.
Read More

How to Increase Flexibility Without Stretching

Sometimes no amount of stretching and foam rolling will make you more supple. Watch this video to find out muscle testing can identify the hidden reasons behind your lack of...
Read More


Find out whether you have osteoarthritis (wear and tear) or inflammatory arthritis. Links to your best treatment options in Berkhamsted.
Read More

Learn About Afferent Input

 Simon King specialises in Afferent Input. Every nerve message that controls your movement and you thoughts has to start from somewhere. So do you know what produces nerve messages? Hint...
Read More

Is Metal Part of the Problem?

Ever wondered why you’re feeling weak and out of whack? Here are the top five most surprising causes of muscle weakness and pain. With a painless examination, an Afferent Input...
Read More

Could it be Dentistry?

For over 30 years, Simon King, our musculoskeletal health specialist, has been working out what really causes people to be ill and injured. Not just how to treat them but...
Read More