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Patellar Tendonitis: What is it & how do you fix it?

Updated: Oct 3, 2019

What is patellar tendonitis?

Patellar tendinitis is an injury to the tendon connecting your kneecap (patella) to your shinbone. The patellar tendon works with the muscles at the front of your thigh to extend your knee so that you can kick, run and jump.

Patellar tendinitis, also known as jumper's knee, is most common in athletes whose sports involve frequent jumping — such as basketball and volleyball. However, even people who don't participate in jumping sports can get patellar tendinitis.

For most people, treatment of patellar tendinitis begins with physical therapy to stretch and strengthen the muscles around the knee.


Pain is the first symptom of patellar tendinitis, usually between your kneecap and where the tendon attaches to your shinbone (tibia).

Initially, you may only feel pain in your knee as you begin physical activity or just after an intense workout. Over time, the pain worsens and starts to interfere with playing your sport. Eventually, the pain interferes with daily movements such as climbing stairs or rising from a chair.


Patellar tendinitis is a common overuse injury, caused by repeated stress on your patellar tendon. The stress results in tiny tears in the tendon, which your body attempts to repair.

But as the tears in the tendon multiply, they cause pain from inflammation and weakening of the tendon. When this tendon damage persists for more than a few weeks, it's called tendinopathy.

Risk factors

A combination of factors may contribute to the development of patellar tendinitis, including:

Physical activity - Running and jumping are most commonly associated with patellar tendinitis. Sudden increases in how hard or how often you engage in the activity also add stress to the tendon, as can changing your running shoes.

Tight leg muscles - Tight thigh muscles (quadriceps) and hamstrings, which run up the back of your thighs, can increase strain on your patellar tendon.

Muscular imbalance - If some muscles in your legs are much stronger than others, the stronger muscles could pull harder on your patellar tendon. This uneven pull could cause tendinitis.

Chronic illness - Some illnesses disrupt blood flow to the knee, which weakens the tendon. Examples include kidney failure, autoimmune diseases such as lupus or rheumatoid arthritis and metabolic diseases such as diabetes.


If you try to work through your pain, ignoring your body's warning signs, you could cause increasingly larger tears in the patellar tendon. Knee pain and reduced function can persist if you don't tend to the problem, and you may progress to the more serious patellar tendinopathy.

When to see a doctor

For knee pain, try self-care measures first, such as icing the area and temporarily reducing or avoiding activities that trigger your symptoms.

Call your doctor if your pain:

  • Continues or worsens

  • Interferes with your ability to perform routine daily activities

  • Is associated with swelling or redness about the joint


To reduce your risk of developing patellar tendinitis, take these steps:

Don't play through pain - As soon as you notice exercise-related knee pain, ice the area and rest. Until your knee is pain-free, avoid activities that put stress on your patellar tendon.

Strengthen your muscles - Strong thigh muscles are better able to handle the stresses that can cause patellar tendinitis. Eccentric exercises, which involve lowering your leg very slowly after extending your knee, are particularly helpful.

Improve your technique - To be sure you're using your body correctly, consider taking lessons or getting professional instructions when starting a new sport or using exercise equipment.

In some cases using a compression strap on the knee can help alleviate pain while exercise. It does not heal the issue but it helps if you choose to continue to train and play sport. You will be able to find these compression straps at any pharmacy.


Static squat with a supportive band - This exercise is a good way to start your leg routine to help fire up the quadricep and also to alleviate the tendinitis you are feeling. You should hold this exercise for 20-30 secs for at least 3 sets. Allow 30-45 secs rest before repeating routine.

Note: This exercise should be done every day if you are experiencing intense pain every day.

Bike - Riding the bike is one of the most important things you can do in terms of building up your legs. It's safe & help builds up the quadricep which then helps to protect the patella.

Look at doing Interval training. I.e 30 secs high intensity/30 secs low intensity for 10 mins.

Barbell Squats (Sitting on a bench) - An exercise that is at the top of the list for all athletes and sports people. Why?

  • It's a great way to build quick muscle in the legs.

  • It's safe to do

  • It's an exercise you can load up quite heavy (once you are use to the movement) because of how safe it is

The main point of this exercise is to protect the knee. To achieve that you will need to make sure that your knee bends just ABOVE 90 degrees once you have sat down on the bench. Anything 90 degrees or further than that will begin to apply pressure on the Patellar tendon. 4 sets of 8-10 reps is ideal for optimal muscle growth in the quadricep.

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