Midportion Achilles Tendinopathy: Progressive Loading and Return-to-Running Reasoning

Assessment

• Pain location and relation to running/jumping load.
• Morning stiffness and next-day response.
• Single-leg heel-raise capacity and calf strength/endurance.
• Running volume, speed, hills and recent training changes.
• Consider rupture, insertional pathology and other posterior ankle pain differentials.

Loading principle

Progressive tendon loading is central. Isometric, isotonic and later energy-storage tasks can be selected according to irritability and sport demands; no single contraction type is mandatory for every athlete.

Dosage and progression

• Begin with a calf-loading dose the athlete can recover from and repeat several times per week.
• Progress resistance, range and unilateral demand before adding high-rate plyometric work.
• Introduce hopping, skipping and running only when basic calf capacity and symptom response are acceptable.
• Use next-day stiffness and pain alongside performance to judge dose.

Return to running

Start with a manageable run-walk or reduced-volume exposure, then progress volume, speed and hills separately. The tendon must eventually tolerate the rate and magnitude of force required by the athlete’s sport.

Common mistakes

• Complete rest for prolonged periods.
• Endless low-load heel raises without progression.
• Returning to full running because resting pain is low.
• Ignoring total weekly load and recovery.

Clinical pearls

• Tendons need load, not chaos.
• Track next-day response.
• Restore calf capacity before demanding repeated high-speed energy storage.

Concise summary

Achilles tendinopathy rehabilitation is a progressive loading problem: restore calf capacity, introduce energy-storage demands and grade running according to symptoms, recovery and performance.