Knee Pain in Badminton Players: What Causes It and What Actually Helps
Knee pain is the most common injury in badminton. Here is what is actually causing it, why stretching alone rarely resolves it, and what the research says about recovery and prevention.
Knee pain is the most commonly reported injury in badminton, accounting for nearly one in five injuries across all levels of play. If you have been dealing with pain below your kneecap that gets worse during or after training, stiffens up the morning after a long session, or aches when you lunge deep to reach a low shot. What you are experiencing what is clinically known as patellar tendinopathy, or what many players call jumper's knee.
Most players manage it with rest, stretching, and a knee brace and assume it will eventually settle down. Sometimes it does. Often it becomes a recurring pattern that worsens over months or years until it starts limiting how much they can play.
Understanding what is actually driving it changes how you approach recovery.
In this post you will learn what patellar tendinopathy is, what causes it specifically in badminton, how it differs from other knee conditions, what approaches the research supports, and where the limits of common self-care strategies actually are.
What Is Patellar Tendinopathy?
Patellar tendinopathy is a condition involving the patellar tendon, the thick band of tissue that connects the kneecap to the top of the shinbone. Its job is to transmit the force generated by the quadriceps muscles through the knee and into the lower leg, enabling jumping, lunging, landing, and explosive push-off.
When the load placed on the tendon consistently exceeds its ability to recover between training sessions, the tendon undergoes structural changes at the cellular level. Instead of the organized collagen structure of healthy tendon tissue, you get a disorganized, thickened, and pain-sensitive pattern of breakdown and failed repair. This is tendinopathy.
It is not tendinitis, a term that implies acute inflammation. Research has shown that patellar tendinopathy is primarily a degenerative process rather than an inflammatory one, which is one of the reasons anti-inflammatory medication alone rarely resolves it, and why rest without rehabilitation often results in the pain returning as soon as load is resumed.
The pain is typically felt at the inferior pole of the patella, which is the bottom tip of the kneecap, or along the body of the tendon below it. It tends to be well-localized and reproducible, meaning you can usually point to exactly where it hurts.
What Causes Patellar Tendinopathy in Badminton Players?
The answer is the lunge. More specifically, what happens to the patellar tendon across hundreds of lunges over the course of a training career.
Every time a badminton player lunges to reach a low shot, the knee bends deeply under load. The patellar tendon has to absorb and transmit the forces involved in that movement, including the deceleration of body weight moving forward and the explosive push-off required to return to the ready position. Research on jumping sports consistently identifies repetitive knee extensor loading as the primary driver of patellar tendinopathy.
A cross-sectional study published in the International Journal of Community Medicine and Public Health in 2026 examined recreational badminton players and found that 29.33% tested positive for jumper's knee using validated clinical assessment tools. A literature review from the same year confirmed that patellar tendinopathy is well established as a common overuse condition in badminton, alongside other jumping-heavy sports like volleyball and basketball.
What distinguishes badminton is the asymmetry of the lunge. Most players lunge predominantly with the same leg, driven by their dominant side. Over time, this creates a significantly uneven distribution of tendon loading that accelerates the pattern of stress accumulation on one side.
The condition also does not develop overnight. It builds gradually, which is why so many players dismiss the early warning signs, some stiffness below the kneecap before it warms up, a dull ache after training, tenderness on pressing the bottom of the kneecap. Most players continue at full load until the pain becomes impossible to ignore.
Where Does It Hurt?
Patellar tendinopathy pain is characteristically felt at the inferior pole of the patella, which is the bony tip at the bottom of the kneecap, or in the tendon itself just below that point.
The pain pattern has some consistent features. It tends to be worse at the start of activity and may ease as you warm up, then return or worsen after extended play or the following morning. Deep lunges, squatting, descending stairs, and sitting with the knee bent for long periods are common aggravating activities. The tendon is typically tender to direct pressure at the inferior pole.
This location and pattern are clinically useful because they help differentiate patellar tendinopathy from other knee conditions that look similar on the surface.
Patellar Tendinopathy vs. Other Knee Conditions
Knee pain in athletes gets labeled as jumper's knee, runner's knee, and other common terms, and the confusion between them affects how people approach treatment.
Patellar Tendinopathy vs. Patellofemoral Pain Syndrome (PFPS)
Patellofemoral pain syndrome, sometimes called runner's knee, involves pain around or behind the kneecap rather than at the tendon below it. It is typically described as a diffuse ache around the kneecap that worsens with prolonged sitting, stairs, squatting, and downhill movement.
The key distinction is location: patellar tendinopathy is localized to the inferior pole of the patella and the tendon below it. PFPS tends to be more diffuse and involves the kneecap itself and its tracking in the groove of the thighbone. Both can coexist, but they involve different structures and respond to different rehabilitation approaches.
Patellar Tendinopathy vs. Iliotibial Band Syndrome (ITBS)
ITBS is lateral knee pain, felt on the outside of the knee, not below the kneecap. It is driven by repetitive friction of the IT band over the lateral femoral condyle and is more common in runners than in racket sport athletes, though it does occur in badminton players due to the repetitive lateral movement demands.
If your knee pain is on the outside of the joint rather than at the front below the kneecap, ITBS or lateral collateral ligament involvement is more likely than patellar tendinopathy.
Patellar Tendinopathy vs. Meniscus Issues
Meniscal pain tends to be felt on the inner or outer side of the knee joint line rather than at the front below the kneecap. It is often associated with locking, catching, or giving way sensations, and tends to be more sensitive to rotational movements and deep flexion. If your knee is swelling, catching, or giving way, a meniscal evaluation is warranted alongside tendon assessment.
Can Patellar Tendinopathy Be Treated?
Yes. Patellar tendinopathy can improve significantly and most players are able to return to full activity with appropriate management. It requires genuine engagement with the right approach over a sustained period. Passive rest alone is not enough.
Patellar tendinopathy is not a condition that gets cured by a single intervention or resolves with rest alone. The research is consistent on this point: passive rest allows symptoms to settle temporarily, but returning to the same loading patterns without addressing the underlying tendon capacity and biomechanics results in the pain returning, often at the same or higher intensity.
Meaningful improvement is achievable. The timeline depends on the severity and duration of the condition and the approach applied. Acute presentations of several weeks or months typically respond faster than chronic cases of a year or more. A realistic expectation for significant functional improvement is often eight to twelve weeks of structured rehabilitation, though many players notice meaningful changes earlier.
When Treatment Takes Longer: Chronic Cases
Some badminton players have been managing knee pain for years. They have learned to play through it, they time their ibuprofen before matches, and they have largely accepted it as a permanent feature of playing the sport.
We see this pattern all the time in active patients. Chronic patellar tendinopathy does not mean untreatable. It does mean the tendon has been under load for long enough that the structural changes are more established and the rehabilitation process needs to be more deliberate and progressive.
A prospective follow-up study published in the American Journal of Sports Medicine followed male athletes with jumper's knee over a long-term period and found that with appropriate management, meaningful improvement was achievable even in chronic cases, though outcomes varied based on the extent of structural involvement and rehabilitation adherence.
For any player in this situation: the longer the pattern continues without being properly addressed, the more established the load tolerance deficit becomes. Starting the right rehabilitation process now is always better than continuing to play through it.
Common Approaches: What Actually Helps
The research on patellar tendinopathy treatment is more developed than for many sports injuries, and the evidence is fairly consistent in pointing toward loading-based rehabilitation as the primary driver of recovery.
Patellar Tendinopathy Exercises
Tendon rehabilitation works by progressively reloading the tendon in a way that stimulates the collagen remodeling process, improving the structural organization of the tendon tissue and its ability to tolerate the specific demands placed on it.
Eccentric exercise, particularly the decline squat protocol, has historically been the most studied approach. A systematic review in BMJ Open Sport and Exercise Medicine found strong evidence for eccentric training in patellar tendinopathy management. More recent research has also supported heavy slow resistance training as a comparably effective alternative, with some evidence suggesting it is better tolerated in-season because it causes less post-exercise soreness.
Isometric exercises, which involve holding a loaded position without moving through a range of motion, have also gained significant research support. A systematic review published in PMC in 2025 found that isometric exercises produced successful outcomes in addressing pain and functional impairment in patellar tendinopathy, with findings that can reliably guide clinical practice.
The key principle across all of these approaches is progressive load: starting at a level the tendon can tolerate and increasing systematically over time rather than pushing through pain.
Patellar Tendinopathy Taping
Patellar taping can reduce pain during activity by altering the mechanical forces through the tendon and providing proprioceptive feedback. It is most useful as an adjunct during rehabilitation to allow higher-quality exercise performance, rather than as a standalone treatment.
Brace for Patellar Tendinopathy
A patellar tendon strap or infrapatellar band can reduce pain during activity by applying pressure to the tendon and partially offloading the inferior pole of the patella. Like taping, it manages symptoms rather than addressing the underlying tendon capacity issue, but it can be a practical tool for continuing to train or compete while rehabilitation is underway.
Physical Therapy for Patellar Tendinopathy
A physical therapist can assess the specific movement patterns contributing to overload, prescribe and progress an individualized loading program, address any hip and ankle deficits that are creating excess demand on the knee, and monitor progress with validated outcome measures. PT is a core component of patellar tendinopathy management for most patients.
Is Surgery Ever Necessary?
For the vast majority of badminton players with patellar tendinopathy, surgery is not necessary and should not be the first consideration. Research consistently supports conservative management as the primary approach.
A systematic review published in BMJ Open Sport and Exercise Medicine examined how surgery compares to physiotherapy and sham surgery for tendinopathy broadly and found that surgery does not consistently outperform well-structured conservative care. The guideline recommendation from that review is that eccentric loading with or without adjuncts should remain the first-line treatment for all individuals with patellar tendinopathy.
Surgery is typically considered only after a sustained period of well-structured conservative rehabilitation has not produced adequate improvement, imaging confirms significant structural pathology, and symptoms are significantly limiting function despite appropriate care. Most players who have genuinely committed to a proper loading-based rehabilitation program do not reach that point.
Why Stretching and Bracing Alone Are Not Always Enough
Stretching the quadriceps and hamstrings addresses muscular flexibility. A knee brace or strap reduces load on the tendon during activity. Both can provide temporary symptom relief. But neither of them addresses the root issue: the tendon's capacity to tolerate the specific demands that badminton places on it.
The patellar tendon became symptomatic because the cumulative load it has been absorbing exceeded what it could recover from. Reducing that load temporarily with a brace and stretching the muscles around it does not change the tendon's structural capacity. As soon as full training load resumes, the same mismatch between demand and capacity resumes with it.
The lunge mechanic itself is often part of the picture. How deeply you lunge, how asymmetrically you load one side, how your hip and ankle mobility influence the way force is distributed through the knee. These are biomechanical factors that stretching and bracing do not assess or address.
For many players, the missing piece is understanding and modifying the actual load pattern driving the problem, alongside a structured tendon loading program that systematically rebuilds the tendon's capacity to handle that demand.
Who Can Help With Patellar Tendinopathy?
Several providers have a meaningful role depending on where you are in the process.
Physical therapists are central to patellar tendinopathy rehabilitation. A PT with experience in tendon pathology can design, progress, and monitor a loading program tailored to your specific presentation and training demands.
Sports chiropractors address the structural and neurological components of the picture. Restricted hip mobility, ankle dorsiflexion limitations, and lumbopelvic asymmetries all influence how force is distributed through the knee during the lunge. When these are identified and addressed, the mechanical load on the patellar tendon during training reduces, which supports the tendon rehabilitation process and reduces the risk of recurrence.
The goal is not to replace one provider with another but to address different layers of the same problem: the tendon itself, the muscles and joints above and below it, and the movement patterns that created the load imbalance in the first place.
Ready to Take a Closer Look?
At Heal Within Chiropractic in Schaumburg, IL, Dr. Desiree Lombos provides specific, thorough sports chiropractic care for active patients including badminton players dealing with knee pain and recurring injury patterns. Your first consultation is complimentary.
Book Your Free Consultation Today →
Related Reading
Badminton Injuries: What the Sport Does to Your Body, Joint by Joint
Chiropractic Care for Athletes: Performance, Recovery, and Injury Prevention
Emotional Stress and Neck Stiffness: Why Your Body Tightens Up
Frequently Asked Questions
What is patellar tendinopathy? Patellar tendinopathy is a condition involving the patellar tendon, the tissue connecting the kneecap to the shinbone. It develops when cumulative load on the tendon exceeds its ability to recover, leading to structural changes in the tendon tissue and characteristic pain at the inferior pole of the kneecap.
Is jumper's knee the same as patellar tendinopathy? Yes. Jumper's knee is the common name for patellar tendinopathy. It is called jumper's knee because it is most prevalent in sports involving repetitive jumping and explosive knee loading, including badminton, volleyball, and basketball.
Can patellar tendinopathy go away on its own? Rest often reduces symptoms temporarily, but without addressing the tendon's load capacity through structured rehabilitation, symptoms typically return when training resumes. Meaningful, lasting improvement requires a progressive loading program rather than passive rest alone.
How long does patellar tendinopathy take to heal? This depends on the severity and duration of the condition. Acute presentations of several weeks to months often show significant improvement within eight to twelve weeks of structured rehabilitation. Chronic cases of a year or more may take longer and require more careful load management throughout the process.
What is the difference between jumper's knee and runner's knee? Jumper's knee refers to patellar tendinopathy, which involves the tendon below the kneecap. Runner's knee typically refers to patellofemoral pain syndrome, which involves pain around or behind the kneecap itself. Both can occur in badminton players, but they involve different structures and respond to different rehabilitation approaches.
Is surgery necessary for patellar tendinopathy? Surgery is rarely necessary and should not be the first step. Research consistently supports conservative loading-based rehabilitation as the primary treatment for patellar tendinopathy. Surgery is typically considered only after sustained, well-structured conservative care has not produced adequate improvement.
References
Rathi, G.K. & Ladha, N. Prevalence of jumper's knee among recreational badminton players: a cross-sectional study. International Journal of Community Medicine and Public Health, 13(1). 2026. https://www.ijcmph.com/index.php/ijcmph/article/view/16074
Theodorou, A., Komnos, G. & Hantes, M. Patellar tendinopathy: an overview of prevalence, risk factors, screening, diagnosis, treatment and prevention. Archives of Orthopaedic and Trauma Surgery, 143(6), 3335–3342. 2023. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10541843/
Challoumas, D., et al. Management of patellar tendinopathy: a systematic review and network meta-analysis of randomised studies. BMJ Open Sport and Exercise Medicine, 7(4), e001110. 2021. https://pubmed.ncbi.nlm.nih.gov/34900334/
Challoumas, D., et al. How does surgery compare to sham surgery or physiotherapy as a treatment for tendinopathy? A systematic review of randomised trials. BMJ Open Sport and Exercise Medicine, 5(1), e000528. 2019. https://pubmed.ncbi.nlm.nih.gov/31692917/
Kettunen, J.A., et al. Long-term prognosis for jumper's knee in male athletes: a prospective follow-up study. American Journal of Sports Medicine, 30(5), 689–692. 2002. https://pubmed.ncbi.nlm.nih.gov/12239003/
Ballesteros-Tapias, V., et al. Comparative effectiveness of exercise interventions for patellar tendinopathy: a systematic review and network meta-analysis of randomized controlled trials. BMC Sports Science, Medicine and Rehabilitation. 2026. https://pubmed.ncbi.nlm.nih.gov/42192475/
