David Hallowell, Podiatrist provides our bio-mechanic service at The Clinic. He and Campbell have worked together in other contexts in the past and both are very happy to be working together in The Clinic, as a combined approach to the treatment of bio mechanical problems is most effective.

David is the designer of the ankle rocker, which is a unique device which replaces lost ankle movement, hence greatly reducing stressed, injured or arthritic ankles. To find out more about David’s work, visit: footandankleclinicni or Glengormley Foot Care

The foot’s interaction with the ground during walking and running can cause or contribute to many lower limb pathologies.

Good foot posture and function is ESSENTIAL for a pain free gait.

Bio- mechanics is the study of how your body works and moves, and how your feet interact with the ground.

During a bio-mechanical evaluation, the podiatrist assesses the client for any movement abnormalities which may be causing or contributing to their pain or discomfort.

This involves an assessment of the muscles and joints of the lower limbs, in both static and dynamic ( moving) contexts.

The podiatrist will also consider any previous injuries, activity levels, lifestyle and favoured footwear to draw up a conclusive picture of the causal factors of the client’s pain.

The podiatrist may also consult with the physiotherapists on site, as often a combined approach is beneficial when deciding the best treatment options for an individual.


The podiatrist may wish to help the client gain good foot posture by means of an in-shoe device ( an orthotic) or in some cases a shoe modification.

Custom made orthotics, if needed, offer increased comfort, improved control of the foot’s movement and position in the shoe, greater long term economy and better clinical outcomes.

David is a specialist re making custom made orthotics. If these are casted correctly and fitted correctly, they can provide appropriate support to eliminate pain and prevent further injuries taking place.Over many years David has also built up specialist knowledge, and has designed and created a special range of braces and rockers which have had quite dramatic benefits for people with significant ankle and foot traumas and injuries.


These dynamic orthosis are the most recent addition to our range and represent one of the greatest advances in orthotic therapy.The devices are used for patients with severely limited ankle dorsiflexion and they actually replace much of the movement of a damaged ankle joint. Therapeutically this means that patients can be spared the break down of the mod foot normally associated with such an injury and therefore enjoy much greater mobility. David has now developed an ankle brace which incorporates the rocker and this has been successfully used with patients who have suffered severe lower limb and ankle trauma.

There are several different types of ankle braces that may be of benefit to clients:


The latest addition to our range of devices is our ankle brace range. Each device has a fully custom foot plate. We have developed a adjustment options that allow the patient to adjust the device as needed to increase either the lateral or medial support. Our newly designed rocker brace is totally unique and has been developed over the last two years in cooperation with trauma victims who have helped with valuable feedback. These can be made from a full ankle cast with the forefoot corrected or from a foam impression cast. The foam impression cast requires more clinical measurements.


This device has a medial strap which pulls the medial arch upward along the line of the tibialis anterior. This allows the patient to adjust the level of support. This devices is primarily used for patients with severe foot dysfunction as seen in cases such as ruptured tibialis posterior and traumatic flat foot.


The lateral sling is designed to give adjustable support under the lateral border of the foot for patients who have suffered with lateral instability. The velcro strap is easily tightened to increase support when needed or to reduce support as the ankle recovers.


As the name suggests this brace has to straps which allows the patient to adjust the level of pull in either direction. The double cradle affect then completely stabilises the foot in the required position. The cradle straps can be elasticated in order to assist with dorsiflexion of the ankle joint.


This is David’s most recent innovation. The rocker, when triggered, can easily produce 10 degrees of dorsiflexion for patients who have suffered severe ankle injury or trauma. The base plate articulates inside the shoe, and at heel strike absorbs shock through the side walls of the device. It holds the ankle at a relatively dorsiflexed position(approx 90 degrees) to that normally taken up by the foot at this stage in the gait cycle. This allows a momentary build up of energy in the device, which is released when the device triggers. It rocks the patient forward,  as the heel is projected upwards. The patient in the video link below had severe trauma to his left foot as a result of an explosion.  He has since completed a marathon having been expected to at best be able to walk with a limp and not to be able to run.