X-Line TPD – (Tibialis Posterior Dysfunction), or moderate/severe hyperpronation, is a potentially crippling pathology, and presents a challenge in the management of foot and ankle pain. Quick and effective treatment is essential in offering symptom relief and functional support. The X-Line TPD has been specifically designed to be the first line of defence against this potentially debilitating condition.
The deep heel seat offers comfortable, and reassuring support, with the plastic shell providing essential rigidity. A sagittally modified medial heel skive is another feature designed to combat foot hyperpronation.

In managing Tibialis Posterior Dysfunction, the greatest orthotic demand is immediacy. Waiting for a custom made device is not an option.This device is ideal for stage1 and stage 2a tibialis posterior dysfunction.



As the car approaches the bridge, it slows to go up the incline. Calcaneal plantarflexion is reduced when the heel meets the mid-foot saddle.

At a safe speed, the car crosses the hump of the bridge. The foot is stabilised when fully loaded on the saddle.
Once over the hump, the car accelerates away. The 1st ray drops into the recess and encourages the MTP joint to bend, the heel raises and sagittal movement within the foot has been maximised.


Due to the nature of the injury there are a set of exercises that are very specfic to Tibialis Posterior Dysfunction.

All the information below is provided by our own in-house Musculoskeletal Podiatrist Andy Horwood. He has been working on these rehabilitation exercises

for the last few years in his own clinic and has met with great success - he even shows us how to avoid patients "cheating" and gaining the full benefit!

Cliick below to learn what Tibialis Posterior Dysfunction is and how it can affect you

The Healthy Step Therapy Band is also available in convenient 1.3 metre cut lengths or 25 metre bulk packs for healthcare professionals (please call us for details - 01457 839549).


I like the X-Line TPD as it is a relatively light weight fairly robust device. The devices offer superior control at the talonavicular region with a higher medial and lateral heel cup and sagitally pitched midfoot saddle providing exeptional stability from initial contact into mid-stance. This makes the X Line TPD a perfect device in the 1st line to intermediate management of various stages of tibialis posterior dysfunction. I have used this device extensively both in athletes and military personnel in the treatment of medial tibial stress with great success.

I find them extremely useful during the rehabilitation phase where proximal stability and posterior muscle tightness often need to be addressed in conjunction with orthosis therapy. The device allows for  any number of changes as the rehabilitation phase progresses.   With a little thought to functional anatomy you can readily adapt these devices with dampners and combined stability posts to aid in deceleration at initial contact, while maintaining stability to allow for weight transmition in midstance. The Horwood Extension and 1st mtp joint dell are of added benefit in the propulsive phase giving added assistance to flexor digitorum longus and at times when planatar intrinsic muscle activity is reduced.

L.S. Leeds

Musculoskeletal Podiatrist

If you have been issued with a pair of TPD insoles by your local NHS clinic and wish to purchase another pair please visit www.healthystep.co.uk

Professional clinicians including Podiatrists, Physiotherapists and Chirporactors please call us on 01457 839 549 to set up a trade account - alternatively email us.

Sizes (approx.)
Code Size UK EU
XLINETPD04 Small 3-5 36-38
XLINETPD03 Medium 6-8 40-42
XLINETPD02 Large 9-11 43-46
XLINETPD01 Extra Large 12-14 47-49
XLINETPD01X Extra Extra large 15-16 50-51

This size chart is intended as a guide only