Managing Popliteus Tendinopathy

Popliteus tendinopathy physiotherapy focuses on managing posterior knee pain linked to overload of the popliteus tendon at the back and outer side of the knee. Symptoms often appear during running, downhill walking, changing direction, or twisting on a planted foot. A structured knee pain physiotherapy assessment helps identify contributing factors and guide recovery.

This condition can sit alongside other causes of posterior knee pain. For that reason, your physiotherapist will also screen for joint irritation, tendon overload, and referred symptoms. Where appropriate, we may also link your plan to broader tendinopathy management principles and activity advice for running-related knee pain.

Quick answer: what is popliteus tendinopathy?

Popliteus tendinopathy involves irritation or overload of the popliteus muscle and tendon. The popliteus supports knee stability and rotational control. It helps “unlock” the knee from a straight position during walking and assists with controlled tibial rotation. When training load increases faster than tissue capacity, symptoms can build over time.

Where do you feel popliteus pain?

Many people describe a sharp or nagging ache at the outer-back corner of the knee. Pain may flare during downhill running or walking, single-leg turning, or when you decelerate. Some people notice symptoms early in activity, while others feel worse later as fatigue changes movement control.

Common causes and contributing factors

This condition commonly develops from repetitive load or biomechanical stress. Contributing factors may include:

• Running volume changes, speed sessions, or downhill running
• Previous knee injury, reduced knee confidence, or instability
• Poor hip and knee control, or strength imbalance
• Fatigue-related movement changes and reduced shock absorption
• Training errors, footwear changes, or technique issues

Assessment often includes a review of movement patterns and biomechanical assessment, particularly for runners and field sport athletes. Your physiotherapist may also discuss load management strategies so you can keep moving while settling symptoms.

Recognising the symptoms

• Pain at the back or outer aspect of the knee
• Discomfort during knee rotation, downhill walking, or cutting movements
• Local tenderness, with or without mild swelling
• Reduced confidence on one leg, especially on uneven ground
• Clicking or catching sensations (not always present)

Could it be something else?

Posterolateral knee pain can also come from other structures. A physiotherapist will assess for overlaps such as lateral meniscus irritation, biceps femoris tendon overload, lateral collateral ligament irritation, or posterolateral corner involvement. This matters because different conditions need different loading, pacing, and exercise choices. If symptoms suggest meniscus involvement, see meniscus tear.

Diagnosis by a health professional

Diagnosis involves clinical assessment and may include imaging such as ultrasound or MRI to help clarify the tissue involved and rule out other knee conditions. Imaging alone does not set your plan. Your physiotherapist will match findings with symptoms, function, and load tolerance so your rehab targets the right problem.

Physiotherapy management for popliteus tendinopathy

1) Tailored exercise and load management

Physiotherapy usually includes progressive strengthening and controlled loading. Your plan may target hip control, calf capacity, and knee rotation control. Many programmes also include knee strengthening exercises to improve load sharing through the lower limb.

2) Pain reduction and movement control

Your physiotherapist may use hands-on techniques, taping, and movement coaching to reduce sensitivity and improve control. Exercise modification often drives change here, especially when you adjust running volume, hills, and speed work in the short term.

3) Return-to-running and sport progressions

Rehab aims to restore confidence, stability, and performance. Many people do best when they return to hills and direction-change drills gradually, using clear progressions and symptom rules. If you play sport, your plan can also include decision-making drills and deceleration work once strength and control improve.

What you can do this week

• Reduce hills and downhill running first, then adjust speed work
• Keep moving, but lower the load that spikes symptoms
• Track your pain response over 24 hours after training
• Prioritise sleep and recovery during heavy training blocks

When to book an assessment

Book in sooner if pain is worsening, you cannot run or walk downhill comfortably, your knee feels unstable, or swelling increases after activity. Early assessment also helps if you are preparing for an event and need a clear plan to train around symptoms.

References

1. Morrissey CD, et al. Prevalence, mechanisms, and return to sport after isolated popliteus injuries (2022).
2. Olewnik Ł, et al. Morphological classification of the popliteus tendon (2021).
3. Breda SJ, et al. Progressive tendon-loading exercise vs eccentric exercise for tendinopathy (2021).
4. Escriche-Escuder A, et al. Load progression criteria in lower limb tendinopathy programmes (2020).
5. Lu R, et al. Lower-limb biomechanics during slope running and knee loading (2024).

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