Achilles
Tendinitis

Achilles tendinitis starts at the foot, not the heel.

Every step transmits force through your Achilles tendon. When foot mechanics are off — even slightly — that tendon pays the price. It won't heal while the cause is still there.

It's not just alignment. It's how your muscles fire.

The shape of what's under your foot determines how hundreds of muscles sequence during every gait cycle. Change that shape precisely — and you change the neuromuscular pattern that stabilises the body.

• Neurological feedback — congruent shape provides continuous proprioceptive input, improving muscle activation quality throughout gait.
• Muscle sequence in gait — hundreds of muscles fire differently based on what's under your foot. Root shape corrects this sequence, reducing caloric demand and improving efficiency.
• True Achilles offloading — the P1 ensures the Achilles is genuinely offloaded, not just supported. Surrounding musculature takes over stabilisation, allowing the tendon to heal.
• Load distribution — volume congruency distributes pressure evenly across the plantar surface, eliminating the sharp, localised load that perpetuates tendon irritation.

How you hold the foot is what we build.

Root is not just the orthotic — it's the clinician's positioning, captured and preserved in the device. After scanning, FootID Pro asks the questions no other lab asks.

After every scan, we need to know:

• Was the subtalar joint held in neutral?
• Was the midtarsal joint maximally pronated — loading the 5th metatarsal head?
• Was the midtarsal joint maximally supinated — loading the 1st metatarsal head?
• Was the forefoot brought perpendicular to the rearfoot?
• Was a forefoot-to-rearfoot balance bisection achieved at 90° relative to the Achilles tendon vector?

CAD/CAM fabrication

• Scan or cast captured — clinician captures foot morphology via FootID Pro, holding the subtalar joint in the chosen clinical position.
• Shape modification applied — forefoot balanced to rearfoot, fat pad expanded, arch adjusted using Root's proprietary CAD/CAM software.
• Technical staff review — every device reviewed against Traditional Root, Modern Root, Blake Inverted, or Accommodative principles.
• Fabricated to the shape — the polypropylene frame and EVA post are fabricated to match the submitted shape precisely.

How your foot shape becomes a precision frame.

The journey from clinical capture to finished orthotic frame is where Root's expertise lives. Every step preserves the shape and position the clinician chose.

• Foot impression captured — the clinician captures the foot using their preferred method. The method chosen directly affects congruent accuracy.
• Positive model created — the impression becomes a physical plaster model or a digital CAD/CAM model via FitFoot360. Digital models are stored indefinitely.
• Root technicians modify the shape — using FitFoot360, technicians apply the Modern Root shape process. Every modification is reviewed against the clinical prescription.
• Orthotic frame fabricated — the polypropylene frame is vacuum formed over the positive model, pressing the material precisely to the shape. Covers, postings, and modifications are then applied.

FitFoot360 CAD/CAM

• STS Sock or 3D Scan → digital model stored indefinitely → recalled for future pairs
• Root technicians modify the digital shape in real-time: arch, heel, width, postings
• Vacuum formed over CAD/CAM positive model — replicable, consistent, precise

Designed to take strain off the tendon.

A 3mm heel lift under the extrinsic rearfoot post elevates the heel relative to the forefoot - directly reducing tensile load on the Achilles tendon. Less strain means less pain, and faster healing. The deep 18mm heel cup controls inversion and eversion of the calcaneus, stabilizing the foot at the subtalar joint for optimal biomechanical control throughout the gait cycle.

Achilles Tendonitis

The Achilles tendon connects the calf muscles to the heel — driving every push-off and every step. As the most mechanically loaded tendon in the body, when stress exceeds what the tissue can tolerate, it breaks down.

Three Distinct Disorders, One Common Mechanism

Achilles tendon disorders share a root cause: repetitive stress that outpaces the tendon's ability to recover. Microtears accumulate, repair incompletely, and the cycle worsens. Athletes, individuals who overpronate during activity, and older patients are most vulnerable — but the condition is not exclusive to any one population.