Achilles Tendinopathy & Tendon Pain

Understanding Achilles Tendinopathy & Tendon Pain

Achilles tendinopathy is an overload injury of the body’s largest tendon, connecting the calf muscles to the heel bone. It typically presents either in the mid-portion of the tendon (2–6 cm above the heel) or at its insertion directly onto the back of the heel bone. Because tendons require progressive mechanical loading to remodel collagen fibres, complete rest often leaves the tendon weak and prone to flaring up as soon as you resume activity.

Common Symptoms & Presentation

• Morning stiffness and aching at the back of the ankle or heel during your first steps out of bed
• Pain at the start of a walk or run that warms up during activity, then aches more strongly the next day
• Localised tenderness, thickening, or a small nodule along the Achilles tendon
• Pain at the back of the heel bone irritated by firm shoe heel counters

Underlying Biomechanical & Clinical Causes

• Sudden spikes in running mileage, hill work, speed sessions, or court sports
• Reduced calf muscle strength and endurance relative to daily or sporting demands
• Subtalar joint overpronation creating a "whipping" torsional stress across the Achilles fibres
• Low-drop footwear transitions or stiff ankle joint mobility

How Eternal Podiatry Assesses This Condition

We differentiate mid-portion from insertional Achilles tendinopathy (as they require different exercise ranges), assess retrocalcaneal bursitis, measure single-leg calf capacity, and evaluate rearfoot mechanics during gait.