Patellar tendinopathy (jumper's knee): rehab that works

What patellar tendinopathy is

The patellar tendon connects the bottom of the kneecap to the top of the shin bone. It acts like a spring, storing and releasing energy every time you jump, land, sprint or change direction. When it is loaded more, or more quickly, than it can adapt to, it becomes painful and less able to tolerate those spring-like actions. That is patellar tendinopathy.

It is not mainly an inflammatory problem, which is why anti-inflammatory tablets and rest on their own tend to give only short-term relief. The tendon needs to be progressively loaded to rebuild its capacity.

The good news is that tendons are living tissue that respond to the right kind of load by becoming stronger and more tolerant. The challenge is that they adapt more slowly than muscle, so the plan needs to be consistent and patient rather than intense and short.

Who gets it and why

It is most common in jumping sports such as volleyball, basketball and athletics, and in young adult men, although anyone can develop it. In the gym it often follows a spike in plyometrics, box jumps, burpee broad jumps, skipping, heavy squatting or wall balls. A HYROX block that adds a lot of lunges and jumping on top of running is a typical story.

• A sudden increase in jumping or plyometric volume
• Training on hard surfaces with lots of landings
• More sessions per week with less recovery between them
• Low quad strength or poor calf and hip capacity to share the load
• Returning to jumping after a break at the same volume as before

Typical symptoms

Pain is felt at a specific spot just below the kneecap, and is usually easy to point to with one finger. It often hurts at the start of activity, may ease as you warm up, then returns afterwards and is worse the following day. Jumping, landing, squatting, stairs and sitting for long periods with the knees bent commonly aggravate it.

In more advanced cases, pain may be present during the whole session or with daily activities. The knee does not usually swell much, lock or give way; if it does, something else may be involved.

What a physio assessment looks at

Your physio will look for tenderness at the lower edge of the kneecap and test how the tendon responds to load, often with a single-leg decline squat. They will check quad, hip and calf strength, watch how you land and squat, and review your training week in detail, because the pattern of load is usually the key.

They will also rule out other causes of pain at the front of the knee, such as runner's knee or a fat pad problem. An ultrasound or MRI is not usually needed and does not always match symptoms, because tendon changes on scans are common in pain-free athletes too.

What usually helps

The best-supported approach is a staged loading programme. It usually starts with isometric holds, such as a wall sit or a leg extension hold, to reduce pain and keep the tendon loaded. It then moves to heavy, slow strength work such as leg press, split squats and squats, then to faster loading, and finally back to jumping and landing, with each stage built up over weeks.

Alongside that, you reduce the aggravating load without stopping all activity: less jumping, fewer back-to-back leg days, and swapping some sessions for cycling or upper-body work. Manual therapy may ease pain in the short term but is not a stand-alone treatment. Injections are generally not a first choice for this condition, and a sports doctor would discuss the options if rehab has not helped.

A staged plan to start with

1. Isometrics: wall sit or spanish squat at a moderately hard effort, 4 to 5 holds of 30 to 45 seconds, once or twice daily.
2. Heavy slow strength: leg press, split squats or Bulgarian split squats, 3 to 4 sets of 6 to 10, 3 seconds down and 3 seconds up, every other day.
3. Faster loading: quicker squats, step-ups and light skipping once strength work is comfortable.
4. Jumping: small jumps and landings, then bigger jumps and plyometrics, building volume gradually.
5. Return to full sport or plyometric classes once jumping is comfortable and morning pain stays stable.

Our guide to plyometrics explains how to build jumping volume sensibly once you reach the later stages.

Keep strength training going after the pain settles. Tendons keep adapting for months, and one or two heavy leg sessions a week alongside a controlled amount of jumping is one of the best ways to stop the problem coming back when your sport or training ramps up again.

Recovery time and when to get help

Tendons adapt slowly. Many people see meaningful improvement after about 12 weeks of consistent loading, and a full return to heavy jumping can take longer, sometimes 6 to 12 months for long-standing cases. The on-site physio at Lycan Strength can plan each stage with you, with 20% off for members; book a physio appointment online.

• Go to A&E if you felt a sudden pop below the kneecap and cannot straighten the knee or lift the leg, as the tendon may have ruptured.
• Go to A&E if the knee is hot, red, very swollen and painful, especially with a fever.
• See a GP or physio promptly if the knee locks, gives way or swells significantly.
• See a GP if a teenager has pain and a tender bump just below the kneecap or at the top of the shin, which can be a growth-related condition.

Questions