Patellar Tendinopathy Explained: Symptoms, Treatment and Recovery

Patellar tendinopathy, often called jumper's knee, is a common cause of pain at the front of the knee. It is particularly prevalent in sports involving repeated jumping, sprinting and explosive movements, including volleyball, basketball, football and tennis. It can be frustrating because the pain may initially seem relatively minor but gradually begin to interfere with training, competition and everyday activities.

The good news is that patellar tendinopathy is a condition that can usually be managed successfully with appropriate rehabilitation. The key is understanding how the tendon responds to load and progressively developing its capacity to cope with the demands being placed upon it.

A 2023 systematic review and meta-analysis estimated the prevalence of patellar tendinopathy at 18.3% among athletes, with particularly high rates reported in volleyball and basketball. [1]

This article explains what patellar tendinopathy is, why it develops, how it is diagnosed and what effective rehabilitation looks like.

What Is Patellar Tendinopathy?

The patellar tendon connects the bottom of the kneecap (patella) to the shin bone (tibia). Together with the quadriceps muscle and quadriceps tendon, it forms the knee's extensor mechanism, allowing you to straighten your knee and generate force during activities such as running and jumping.

Tendons are designed to tolerate substantial amounts of mechanical load. They adapt to the demands placed upon them, becoming capable of handling greater forces when loading is introduced progressively. Patellar tendinopathy can develop when the demands placed on the tendon repeatedly exceed its current capacity. Learn more about patella tendinopathy and how we approach rehabilitation. This does not necessarily mean that one particular session has "damaged" the tendon. More commonly, the problem develops over time as the balance between training load and tissue capacity becomes unfavourable.

For example, someone may increase their running, add several weekly football matches, return to competitive sport after a period away, or suddenly introduce a large amount of jumping into their training. The tendon may simply not yet be conditioned to tolerate the new workload. Importantly, patellar tendinopathy is not simply an inflammatory condition. The biological changes associated with persistent tendon pain are more complex, which is why treatments aimed solely at reducing inflammation are generally not considered the mainstay of rehabilitation.

Recognising Patellar Tendinopathy

The typical presentation is pain localised to the inferior pole of the patella or the patellar tendon itself. The behaviour of the pain is often particularly informative. Symptoms commonly appear during activities that place substantial force through the extensor mechanism, including:

• Jumping and landing

• Running

• Squatting

• Lunging

• Sprinting

• Accelerating and decelerating

• Repeated stair climbing

Early in the condition, symptoms may only appear during higher-load activities. You may be able to train relatively normally but notice discomfort after repeated jumping or during the later stages of a session.

As symptoms persist, pain may begin earlier during activity and take longer to settle afterwards. Some people also experience stiffness after periods of inactivity. A useful clinical feature is that the pain is generally load-dependent rather than being present constantly at rest. However, anterior knee pain does not automatically mean patellar tendinopathy. Patellofemoral pain, fat-pad irritation, cartilage pathology and other knee conditions can produce similar symptoms. This is why diagnosis should be based on the overall clinical presentation rather than simply where the knee hurts.

Why Does Patellar Tendinopathy Develop?

There is rarely one single cause. Instead, patellar tendinopathy usually develops through an interaction between tendon capacity, training load and individual factors.

Sudden Changes in Training

A common scenario is a rapid increase in the amount or intensity of activity.

This could involve:

• Starting a new sport

• Increasing running mileage

• Adding additional training sessions

• Returning to sport after an injury

• Increasing jumping volume

• Beginning a new strength programme

The issue is not necessarily that the activity itself is harmful. The problem is that the tendon may not yet have developed sufficient capacity for the new demand.

Repeated High-Load Activities

Jumping and explosive movements place substantial demands on the patellar tendon.

Athletes who repeatedly accelerate, decelerate, jump and land may therefore accumulate considerable tendon loading over the course of a training week. This is particularly relevant during congested periods of competition, when the opportunity for recovery between sessions may be reduced.

Individual Factors

Research has identified a number of factors that may be associated with patellar tendinopathy, including aspects of lower-limb strength, flexibility and sporting exposure. However, these factors should not be interpreted as simple causes.

For example, having weak glutes does not automatically cause patellar tendinopathy, and improving one isolated movement pattern is unlikely to resolve the condition by itself.

A 2018 systematic review and meta-analysis found associations between several potentially modifiable factors and patellar tendinopathy, but also highlighted limitations in the available evidence. The practical implication is that rehabilitation should consider the whole athlete, rather than searching for one specific mechanical fault.

How Is Patellar Tendinopathy Diagnosed?

Patellar tendinopathy is primarily diagnosed through a clinical assessment.

A clinician will typically consider:

• The location and behaviour of your symptoms

• Your sporting and training history

• Recent changes in activity

• Activities that reproduce your symptoms

• Tenderness around the patellar tendon

• Quadriceps strength

• Lower-limb function

• Your ability to tolerate progressively greater loads

Specific loading tests can help determine whether the patellar tendon is the likely source of symptoms.

Do You Need an MRI or Ultrasound?

Not necessarily. Imaging can be useful when the diagnosis is uncertain, symptoms are atypical or there is concern about another condition. However, imaging needs to be interpreted carefully.

Tendons can demonstrate structural abnormalities on ultrasound or MRI in people who have little or no pain. Conversely, someone can experience significant symptoms without dramatic imaging abnormalities. Therefore, the scan should not be treated as the diagnosis by itself. The most useful approach is to combine clinical symptoms, physical examination and functional performance, using imaging when it adds meaningful information.

Treatment: What Actually Helps?

The central principle of treatment is to restore the tendon’s capacity to tolerate load. This usually means reducing activities that are currently aggravating symptoms while maintaining as much appropriate physical activity as possible.

Treatment can include:

• Education about the condition

• Temporary modification of sporting activity

• Progressive resistance training

• Gradual exposure to jumping and running

• Strength development

• Sport-specific conditioning

• Management of overall training load

Other treatments may sometimes be used alongside rehabilitation, but exercise-based loading remains the foundation. A 2020 systematic review and GRADE analysis concluded that exercise-based treatment provides meaningful improvements in pain and function for people with patellar tendinopathy.

Do You Need Complete Rest?

Usually, complete rest is unnecessary. Stopping all activity may reduce symptoms in the short term, but it does not address the tendon’s ability to tolerate future loading. Instead, the aim is to identify a manageable level of activity.

For example, someone who develops pain after 30 minutes of running might temporarily reduce their running volume while continuing with strength training and other activities that are well tolerated.

Similarly, an athlete may need to reduce jumping volume rather than eliminate all exercise.

This approach allows the tendon to continue receiving an appropriate stimulus while avoiding repeated exposure to loads that currently exceed its capacity. The amount of activity that is appropriate will vary considerably between individuals.

Patellar Tendinopathy Rehabilitation

Rehabilitation should progress from building basic capacity to exposing the tendon to the specific demands of sport. There is no single exercise programme that is appropriate for everyone, but a typical progression can be divided into several stages.

Stage 1: Establish an Appropriate Starting Load

The initial objective is to identify exercises that can be performed without causing a significant flare-up in symptoms.

This might include:

• Isometric knee extension

• Wall sits

• Leg press

• Controlled squats

Isometric exercises can sometimes provide short-term pain relief, which may make subsequent exercise more comfortable. However, they should be viewed as one tool within rehabilitation rather than a treatment that is inherently superior to other forms of loading.

A 2019 systematic review found insufficient evidence to conclude that isometric exercise consistently provides superior outcomes compared with other exercise approaches.

The priority is therefore to establish a sustainable loading programme.

Stage 2: Develop Strength

Once an appropriate baseline has been established, resistance training becomes progressively more challenging.

Exercises may include:

• Squats

• Leg press

• Split squats

• Step-downs

• Knee extensions

• Romanian deadlifts

• Calf raises

The aim is to gradually increase the amount of force the lower limb can produce and tolerate.

This stage should not be rushed. Increasing resistance, range of movement, repetitions or exercise complexity should be based on how the tendon responds to the current workload.

Evidence suggests that both moderate and heavy resistance training can improve symptoms and physical capacity in people with patellar tendinopathy. A 2021 randomised clinical trial found improvements following both approaches. The important factor is therefore progressive resistance, rather than finding one perfect loading range.

Stage 3: Reintroduce Energy-Storage Activities

Strength alone does not prepare an athlete for jumping. The patellar tendon must eventually be able to absorb and release energy rapidly. This is known as energy-storage and release loading.

Exercises can gradually progress from:

• Double-leg hopping

• Small jumps

• Controlled landing drills

• Single-leg hopping

• Repeated jumps

• Bounding

• Reactive jumping

The amount of impact, speed and repetition should increase progressively. For a recreational athlete, this may simply mean returning to comfortable jumping. For a competitive basketball or volleyball player, the tendon eventually needs to tolerate repeated maximal jumps, rapid landings and high-intensity movements.

Stage 4: Return to Running and Sport

The final stage involves transferring the improvements achieved in rehabilitation into the athlete's actual sport.

Running may progress through:

1. Straight-line jogging

2. Faster running

3. Acceleration

4. Deceleration

5. Planned changes of direction

6. Reactive movements

7. Sport-specific drills

   
   

For football, this might include repeated sprinting, cutting, shooting and small-sided games.

For tennis, rehabilitation may need to include split steps, lateral movements, lunging and repeated accelerations. These demands are important when progressing from general knee rehabilitation back to the court. Our tennis rehabilitation in Wimbledon incorporates strength, movement and court-specific progression for players returning from injury.

For skiing, the focus may shift towards eccentric quadriceps strength, repeated loaded knee flexion, lateral control and fatigue resistance. The aim is to expose the tendon to the same types of forces and fatigue it will experience during competition. Building these qualities before returning to the slopes is particularly important when knee symptoms have limited training. Our skiing rehabilitation programmes focus on developing the strength, control and physical capacity required for skiing.

Returning to running should be progressed according to how the tendon responds to increasing load, rather than simply waiting until pain has disappeared. Our running injury rehabilitation programmes use progressive strength, load management and structured running exposure to help runners rebuild capacity and return to training.

How Do You Know When You Are Ready to Return to Sport?

Being able to perform a squat without pain is not enough.

Return to sport should consider:

• Pain response

• Strength

• Single-leg function

• Jumping ability

• Running tolerance

• Change-of-direction capacity

• Training volume

• Confidence

• Sport-specific demands

The athlete should be able to tolerate progressively greater training loads without a significant increase in symptoms. It is also important to consider what happens after exercise and the following morning. A knee that feels fine during training but becomes significantly more painful and stiff the next day may not yet be ready for that particular workload. Return to sport should therefore be treated as a gradual process rather than a single date.

How Long Does Patellar Tendinopathy Take to Recover?

There is no reliable universal timeline. Some athletes improve within a few months, while others experience symptoms for considerably longer. The duration of symptoms before treatment appears to be relevant. A systematic review of treatment studies found that longer symptom duration was associated with poorer outcomes.

Recovery is influenced by:

• How long symptoms have been present

• Current tendon capacity

• Training load

• Sporting demands

• Strength

• Previous injury

• Rehabilitation adherence

• Ability to modify aggravating activities

This is why repeatedly stopping activity until the pain disappears can become a cycle.

The tendon may feel better after rest but then struggle again when the athlete returns to their previous workload. Successful rehabilitation aims to break that cycle by building capacity alongside an appropriate progression of activity.

What If Exercise Causes Some Pain?

Pain during rehabilitation does not automatically mean that the tendon is being damaged. Tendon pain is influenced by multiple factors, and some discomfort during loading can be acceptable.

The important consideration is the overall response.

Monitor:

• Pain during the exercise

• Symptoms immediately afterwards

• Pain later that day

• Morning stiffness

• Changes in function

• Ability to complete subsequent training

If symptoms remain reasonably stable, the current loading level may be appropriate.

If symptoms progressively worsen or recovery between sessions becomes more difficult, the training load may need to be adjusted. This is one reason why rehabilitation programmes should be individualised rather than based solely on a predetermined number of repetitions or weeks.

Can Patellar Tendinopathy Be Prevented?

No prevention strategy can eliminate the risk completely, but improving tendon capacity and managing training load can help.

Build Capacity Before Increasing Demand

If you know that your training volume is about to increase, prepare the tendon beforehand.

For example, a footballer returning to pre-season should ideally have maintained strength during the off-season rather than suddenly going from minimal activity to several high-intensity sessions per week.

Increase Training Gradually

Avoid large, sudden increases in:

• Running volume

• Sprinting

• Jumping

• Match frequency

• Training intensity

Maintain Strength

Strength training should remain part of an athlete's programme throughout the year. This is particularly important during periods when sporting demands are high.

Respond to Early Symptoms

Persistent pain should not simply be ignored. Addressing symptoms early gives you more opportunity to modify training and build capacity before the problem begins significantly affecting performance.

When Should You Have Your Knee Assessed?

Consider professional assessment if:

• Pain has persisted for several weeks

• You repeatedly experience pain during jumping or running

• Your sporting performance is declining

• You have had to reduce training because of knee pain

• Symptoms are becoming more frequent

• You are unsure whether the patellar tendon is actually the source of your pain

An assessment is particularly useful when symptoms are persistent because anterior knee pain has several possible causes. Getting the diagnosis right allows rehabilitation to be targeted towards the structure and problem actually responsible for your symptoms.

If you're based in Wimbledon and persistent knee pain is affecting your running, training or sport, our physiotherapy and sports rehabilitation in Wimbledon service provides assessment and progressive rehabilitation based around your individual goals.

The Bottom Line

Patellar tendinopathy is a common condition in active people, particularly those involved in jumping, running and explosive sports. The answer is rarely simply to stop exercising. Instead, successful management generally involves understanding the relationship between load and capacity, modifying aggravating activity when necessary and progressively strengthening the tendon and surrounding musculature. Rehabilitation should eventually progress beyond basic strengthening to running, jumping, acceleration, deceleration and the specific demands of your sport. The goal isn't simply to make the knee feel better. It is to develop a tendon capable of handling the demands you want to place on it.

At Summit Rehabilitation in Tring and Wimbledon, we work with active people who want to overcome persistent knee pain and return to running, football, tennis, skiing and other sports.

Return to Play means building the capacity to perform, not simply waiting for the pain to disappear.

Book an Initial Assessment

References

1. Breda, S.J., Oei, E.H.G., Zwerver, J., et al., 2023. Epidemiology of patellar tendinopathy in athletes and the general population: a systematic review and meta-analysis. Orthopaedic Journal of Sports Medicine, 11(6).

2. Sprague, A.L., Smith, A.H., Knox, P., Pohlig, R.T. and Silbernagel, K.G., 2018. Modifiable risk factors for patellar tendinopathy in athletes: a systematic review and meta-analysis. British Journal of Sports Medicine, 52(24), pp.1575–1585.

3. Mendonça, L.D.M., Ocarino, J.M., Bittencourt, N.F.N., et al., 2020. How strong is the evidence that conservative treatment reduces pain and improves function in individuals with patellar tendinopathy? A systematic review of randomised controlled trials including GRADE recommendations. British Journal of Sports Medicine, 54(8), pp.470–480.

4. Lim, H.Y., Wong, S.H., 2019. Effects of isometric, eccentric, or heavy slow resistance exercises on pain and function in individuals with patellar tendinopathy: a systematic review. Journal of Science and Medicine in Sport, 22(1), pp.1–6.

5. Breda, S.J., Oei, E.H.G., Zwerver, J., et al., 2021. Clinical outcomes, structure, and function improve with both heavy and moderate loads in the treatment of patellar tendinopathy: a randomized clinical trial. American Journal of Sports Medicine, 49(8), pp.2051–2060.

6. Challoumas, D., Clifford, C., Kirwan, P.D., et al., 2021. How does surgery compare with sham surgery or physiotherapy for patellar tendinopathy? A systematic review and meta-analysis. British Journal of Sports Medicine, 55(5), pp.273–280.

7. Lopes, A.D., Rizzo, R.N., Hespanhol, L., Costa, L.O.P. and Kamper, S.J., 2025. Exercise for patellar tendinopathy. Cochrane Database of Systematic Reviews, 5, CD013078.

8. Rhim, H.C., Jeong, J., Yoon, J.S., et al., 2021. Management of patellar tendinopathy: a systematic review and network meta-analysis of randomised studies. British Journal of Sports Medicine, 55(12), pp.702–711.