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Jumpers knee or patellar tendonitis is pain in the tendon which attaches the kneecap or patella to the top of the shin bone or tibia. It is usually an overuse injury caused by repetitive strain.
Patellar tendonitis can be a tricky condition to treat and requires a substantial period of rest and a thorough treatment and rehabilitation program. In the most severe or persistent cases, surgery may be required.
Jumpers knee symptoms
Symptoms of jumpers knee consist of pain at the bottom front of the kneecap over what is called the lower pole of the patella.
The bottom of the patella will be very tender when pressing in. The athlete is likely to experience aching and stiffness after exercise and pain when contracting the quadriceps muscles in acute cases.
The affected tendon may appear larger than the unaffected side. In particular jumping activities are likely to be most painful. See jumpers knee assessment for more details. Jumpers knee can be categorised into four grades of injury:
- Grade 1: Pain only after training
- Grade 2: Pain before and after training but pain eases once warmed-up
- Grade 3: Pain during training which limits your performance
- Grade 4: Pain during every day activities
Warning!! - This injury may seem like a niggling injury that is not that bad. Many athletes continue to train and compete on it as it may not be a debilitating injury and recovers after a short period of rest. However, neglect jumpers knee at your peril! If left to become chronic it can be very difficult to treat and may require surgery.
Treatment for patella tendonitis consists of reducing the initial pain and inflammation through rest and ice followed by a rehabilitation program which will include eccentric strengthening exercises.
Self help treatment
Jumpers knee treatment the athlete can do themselves depends on the extent or grade of the injury. A more severe injury may require longer rest and may result in surgery. Rest from training In mild to moderate cases, adaptation of training to reduce impact and jumping activities may be suitable.
Apply cold therapy on a regular basis, especially during the acute stage which is usually the first 24 to 48 hours and after any form of exercise. A cold therapy wrap or gel ice pack is ideal. If the tendon is painful then ice can be applied for 10 minutes every hour reducing frequency as symptoms improve.
Wearing a knee support, or jumpers knee strap can reduce pain and ease the strain on the tendon. A jumpers knee strap wraps around the tendon just below the knee changing the angle of the tendon against the patella which changes the part of the tendon the forces are transmitted.
Stretch the the quadriceps muscles at the front of the thigh regularly. This will lengthen then muscles and place less stress on the tendon.
Pull the the ankle up until a stretch is felt at the front of the thigh, keeping the knees together. Hold stretches for 10 seconds in the acute stage and up to 30 seconds later in the rehabilitation program. Testing the flexibility of the thigh muscles is a good idea.
Read more on stretching exercises for jumpers knee.
See a sports injury professional who can advise on a rehabilitation program. This will include most likely include eccentric strengthening exercises which are done by performing the downwards phase of a squat exercise. This is done by dropping down slowly and then up more quickly using the good leg to help on the up phase.
Read more about strengthening exercises for jumpers knee.
Complete the the VISA pain questionnaire to monitor symptoms which can often be difficult to describe or measure with a long term chronic condition.
A doctor may prescribe anti-inflammatory medication e.g. ibuprofen. Do not take ibuprofen if you have asthma and check with a doctor before taking any medication. It is thought that anti-inflammatory medication may help in the short term with acute inflammation and pain but may even hinder healing later on.
A patella tendon taping technique can be used to relieve pain and take the pressure off the tendon in the same way a patella strap works. It does this by applying a transverse or horizontal force to the tendon with the two twisted strands of tape which changes the angle of the forces transmitted through the tendon.
Cross friction massage to the tendon may also be beneficial, particularly for more chronic cases. Massage can break the injury down to its acute stage and so encourage healing. It may also help to realign new collagen fibres in the tendon as they grow.
They will prescribe and supervise a full rehabilitation program consisting of eccentric strengthening exercises. During rehabilitation the VISA pain questionnaire may be filled out to monitor the progress of the tendinopathy.
View interviews with expert therapists on jumpers knee.
Aprotinin injections may help tendinopathies by restoring enzyme balance in the tendon. If the knee does not respond to conservative treatment, surgery may be required. A lateral release of the patella tendon is usually successful.
Surgery is normally advised as a last resort. Also, there is little convincing evidence to support the use of surgery over conservative treatment for patellar tendinopathy. Surgery either includes excision of the affected area of the tendon or a lateral release where small cuts are made at the sides of the tendon which take the pressure off the middle third. An intensive rehabilitative program is normally advised following surgery. In particular the use of eccentric strengthening exercises may help stimulate healing.
Play video on patella tendonitis surgery.
Jumpers knee in detail
The patella tendon, also known as the patella ligament joins the kneecap or patella to the shin bone or tibia. The patella tendon is extremely strong and allows the quadriceps muscle group to straighten the leg. The quadriceps actively straighten the knee in jumping to propel the individual off the ground as well as functioning in stabilizing their landing. Huge forces are transferred through the tendon.
As such this tendon comes under a large amount of stress especially in individuals who actively put extra strain on the knee joint such as those who regularly perform sports that involve direction changing and jumping movements. With repeated strain, micro-tears as well as collagen degeneration may occur as a result in the tendon.
This is known as patellar tendinopathy or Jumpers Knee. It should be distinguished from patella tendonitis (tendinitis) as this condition indicates an acute inflammation of the tendon whereas tendinopathy is more about degeneration of the tendon. In practice the majority of chronic cases are more likely to be degeneration of the tendon rather than acute inflammation which should settle down after a few days rest.
It is likely that an athlete with patella tendonitis will have poor Vastus medialis obliquus (VMO) function. This is the muscle on the inside of the quadriceps near the knee. They may also have significant weakness in the calf muscles.
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