14/11/2023
Patellar tendinopathy (PT) which is also known as jumpers knee is commonly seen sports which involve running & jumping. This musculoskeletal disorder is characterised by progressive activity-related anterior knee pain and patellar tendon dysfunction. This disorder can lead to disability in both athletes and non-athletes.
Risk Factors
Hamstring and quadriceps muscle tightness, reduced ankle dorsi flexion, hyoerpronation of the foot, poor joint coordination, increased training volume and intensity of training are some common risk factors for PT. Training on hard courts and synthetic turf can also increase risk of injury.
Treatment
Various types of treatment are used in management of PT. These include rest, activity modification, anti-inflammatory medication, injection therapies, taping, eccentric exercises, extra corporeal shock wave therapy, percutaneous electrolysis, and and surgery. Even though various treatment options are available for PT, no single method has proven to result in consistent and near complete recovery in patients. Conservative management is considered to be the first line of treatment in PT, in the form of medical & physical therapies.
Rehabilitation Protocol
The proposed three stage rehabilitation protocol is based on latest research. The exercise dosage is not mentioned in this post as it will vary from patient to patient.
Stage 1 should focus on pain modulation and load management, especially in the case of in season athletes. Strength imbalances and poor flexibility should be addressed at this stage. Load management and activity modification are some of the most effective methods to reduce pain and other symptoms of PT. However, it is also important to avoid complete cessation of activities as this may further reduce the loading capacity of the tendon. Reducing the volume and frequency of training, removing high load energy storage activities such as elrunning, jumping etc. from the training are some of the most effective methods of load management of the tendon. Studies show that sustained mid-range isometric exercise is an effective method of pain reduction in PT.
Stage 2: Once the patient can perform isotonic exercises with minimal pain, heavy slow resistance exercises and eccentric exercises can be initiated. Exercises such as squats, hack squats and leg press from knee extension to 90ยฐ of knee flexion can be introduced. A gradual progression of the exercises are recommended. Exercises involving single limb can be performed as the condition progresses. Additional resistance can be provided by means of weighted belts, vest or bags with weight.
Stage 3: The major focus of functional strengthening is on movement pattern and kinetic chain deficits, as well as on the high load tendon capacity. Once the movement pattern and kinetic chain is improved the training can progress to plyometric and sport specific activities. High energy training such as skipping, jumping, sprinting and bounding movements along with agility training should also be included in the training program.
Attached in the video are an example of some isometric exercises that may be prescribed during stage 1 of the rehabilitation protocol.