Patellar Tendinopathy

For a general introduction to jumper's knee, its causes and simple self-care, see patellar tendinitis. This page explains the tendinopathy model and the stepwise rehab that clinicians use.

Tendinopathy vs tendinitis

The suffix "-itis" means inflammation. When researchers studied painful patellar tendons, they mainly found disorganized collagen, more ground substance and new small blood vessels, with few classic inflammatory cells. That is why sports medicine now uses tendinopathy: a general term for a painful tendon whose structure has adapted poorly to load.

Tendinopathy is often described as a continuum:

1. Reactive: a short-term thickening after a sudden jump in load. Can settle in weeks if load is adjusted.
2. Disrepair: the tendon tries to heal but the structure becomes disorganized.
3. Degenerative: areas of the tendon change permanently, more often in older or long-standing cases.

Imaging changes do not always match pain. Many athletes have abnormal tendons on ultrasound without symptoms, so treatment is guided by pain and function, not by scan appearance.

Symptoms and how it is assessed

• Pain localized to the bottom tip of the kneecap, sometimes lower along the tendon
• Pain that is load-dependent: worse with jumping, landing, squats and stairs, and after sitting
• Stiffness at the start of activity that eases as you warm up, then returns after

Clinicians press on the tendon, watch a single-leg decline squat and hop, and check hip and calf strength and ankle mobility. The VISA-P questionnaire scores pain and function from 0 to 100 and is used to track progress. Ultrasound or MRI is used when the diagnosis is unclear or recovery stalls.

Other causes of front-of-knee pain to consider include patellofemoral pain syndrome, fat pad irritation and, in growing children, Osgood-Schlatter disease or Sinding-Larsen-Johansson syndrome.

The pain-monitoring rule

Tendons do not need to be pain-free to be loaded. A common guide is:

• Pain during exercise up to about 3 out of 10 is acceptable
• Pain should settle within 24 hours, and morning stiffness or the next-day squat test should not be worse

If symptoms are worse the next day, reduce the load for the next session rather than stopping altogether.

Phased rehab for patellar tendinopathy

Progress through phases based on symptoms, not dates. Each phase usually takes 2 to 6 weeks.

Strength work for the calves, hips and thighs continues throughout, and strength training usually carries on after return to sport to prevent recurrence.

Load management during rehab

• Reduce jumping and sprinting volume, rather than stopping all activity
• Avoid sudden increases in training load, such as preseason or a new hard surface
• Space high-load sessions by at least 48 hours where possible

Other treatments: what the evidence says

Recovery and outlook

Most people improve substantially within 3 to 6 months of consistent rehab. Long-standing cases can take 6 to 12 months, and a minority of athletes have symptoms for years. Recurrence is common when strength work stops, so a maintenance program of 1 to 2 sessions a week is advised.

Frequently asked questions

What is the difference between patellar tendinopathy and patellar tendinitis?

They describe the same condition, jumper's knee. Tendinitis implies inflammation, while tendinopathy reflects the evidence that the tendon mainly shows structural change and failed adaptation to load. The newer term also explains why strengthening, not anti-inflammatory treatment, is the core of recovery.

What are the best exercises for patellar tendinopathy?

Isometric holds such as wall sits help early pain. Next come slow, heavy strength exercises such as leg press, split squats and single-leg decline squats. Later, skipping, hopping and landing drills retrain the tendon's spring before returning to sport.

How long does patellar tendinopathy take to heal?

Mild, recent cases can settle in 6 to 12 weeks. Most established cases need 3 to 6 months of progressive loading, and stubborn long-term cases may take up to a year. Returning to full jumping too early is the most common reason for setbacks.

Should I rest completely with patellar tendinopathy?

No. Complete rest weakens the tendon and symptoms usually return when activity resumes. Reduce aggravating activities such as jumping and sprinting, and keep loading the tendon with controlled exercises, using the 24-hour pain response to guide progression.

Is a steroid injection good for jumper's knee?

Steroid injections are generally not recommended for patellar tendinopathy. They may reduce pain for a few weeks, but pain often returns, and they can weaken the tendon and raise the risk of rupture. Exercise-based rehab gives better long-term results.