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Background & Etiology

A tendon is part of the muscle that attaches the muscle to bone. It is a strong, fibrous tissue that is responsible for transferring the forces generated by the muscle to the bone, thus producing movement at the joint. When a tendon becomes irritated or inflamed it becomes painful, especially with movement. Inflammation of the tendon is called tendinitis.

Tendinitis in the knee occurs when the tendons in the knee become inflamed. There are two main tendons in the knee—the quadriceps and patellar. The quadriceps tendon connects the quadriceps muscles of the thigh to the kneecap and provides the power for straightening the knee. The patellar tendon connects patella or kneecap to tibia or shinbone—which means it’s really a ligament.

Hamstring Tendon

The hamstring muscles originate at the ischial tuberosity (or the bone where you sit.) The medial hamstrings, semitendinosus and semimembranosis, attach to the inside of the knee on the tibia (lower leg bone.) This attachment is referred to as the pes enserines. The lateral hamstring (biceps femoris,) attaches to the outside of the knee complex at the lateral aspect of the fibula (lower leg bones.) The function of the hamstrings is to bend the knee and extend or straighten the hip. They play a critical role in performing walking, running, jumping and kicking motions.

Iliotibial band

The iliotibial band is a thick band of fascia on the lateral side of the knee. It extends from the outside part of the pelvis, over the hip and knee, and placing just below the knee. It stabilizes the knee during running since it moves from the behind to the front of femur.

Physical Therapy Interventions

Physical Therapists are professionals, educated and trained to administer interventions. As defined by The Guide to Physical Therapist Practice, interventions are the skilled and purposeful use of physical therapy methods and techniques to produce changes consistent with the diagnosis, prognosis and the patient or client’s goals.

Your physical therapist will perform a thorough evaluation to assess and determine the following:

  • Tendon: a series of tests will be performed to determine which tendon is involved.
  • Strength: resisted testing is performed to determine if there is associated weakness or strength imbalances
  • Flexibility: tight muscles can contribute to poor mechanics and weakness creating imbalances and making the knee more susceptible to tendinitis.
  • Technique: Often it is the way we perform motions (run, jump, cycle or row) that may cause a problem. Discuss and observe the activities you participate in, that may have started the problem to improve technique.
  • Training: review your training program and any sudden changes that may have precipitated or caused the present condition.
  • Alignment or footwear: a physical therapist will assess your leg lengths, foot mechanics and alignment to see if there are any imbalances. Checking for appropriate footwear is a crucial part of balancing the stresses applied to your legs and body.

Physical therapy for knee tendinitis must remain conservative at the onset to avoid aggravating the condition. Emphasis will be on rest, reducing the inflammation and increasing the blood circulation for healing. Once the initial inflammation has been reduced, a program of stretching and strengthening will be initiated to restore flexibility to the muscles involved and improve strength to reduce stress on the tendons and the knee. Taping or strapping to rest and reduce the stress placed on the tendon and promote healing may be necessary. Your therapist is trained in these specific taping techniques.

Common causes of knee tendinitis include:

  • Repetitive activities such as running, jumping or kicking.
  • Sudden and frequent deceleration, acceleration or stopping and starting activities that may occur in sporting activities.
  • A rapid increase in frequency or intensity of activity, exercise or training.
  • Doing too much too quickly when it comes to exercise or activity.
  • Improper running technique or training on hard surfaces
  • Knee pain and tenderness
  • Swelling or bruising in the knee.
  • Pain following activities like running, jumping or kicking.

Treatment of knee tendinitis will depend on the severity of the condition. When treating acute knee tendinitis the principles of RICE (rest, ice, compression and elevation) should be initiated.

  • Rest: avoid the activities that produce the pain (jumping, running, going up or down stairs, kneeling and squatting.)
  • Ice: apply ice to the tendon or area of inflammation. It is one of the fastest ways to reduce swelling, pain and inflammation. Apply it right away and then at intervals for about 20 minutes at a time. Do not apply ice directly to the skin.
  • Compression: such as an ace bandage to help take stress off the injured muscle may be useful. When using ice, apply light compression. This is especially helpful if swelling is present.
  • Elevation: elevate the area to help reduce swelling.

Mild

In mild cases rest, ice and medication may be enough to reduce the pain. Once the pain is reduced, physical therapy is recommended to develop a series of stretching and strengthening exercises to prevent reoccurrence of the injury. Return to activity should be gradual to prevent a flare up of symptoms.

Moderate to Severe

If the problem persists, consulting with your health care provider should be the next step. Your physician and/or physical therapist will perform a thorough evaluation to determine what tendon(s) is involved, the severity of the condition, and the best course of treatment.

Common Physical Therapy interventions in the treatment of Knee Tendinitis include:

  • Manual Therapeutic Technique (MTT): hands on care including soft tissue massage, stretching and joint mobilization by a physical therapist to improve alignment, mobility and range of motion of the knee. Use of mobilization techniques also help to modulate pain.
  • Therapeutic Exercises (TE) including stretching and strengthening exercises to regain range of motion and strengthen muscles of the knee and lower extremity to support, stabilize and decrease the stresses place on the bursa and tendons of the knee.
  • Neuromuscular Reeducation (NMR) to restore stability, retrain the lower extremity and improve movement techniques and mechanics (for example, running, kneeling, squatting and jumping) of the involved lower extremity to reduce stress on the bursa and tendons in daily activities. Taping, strapping or bracing may be useful to rest the tendon and promote healing.
  • Modalities including the use of ultrasound, electrical stimulation, ice, cold laser and others to decrease pain and inflammation of the involved tendon and bursa.
  • A home program that includes strengthening, stretching and stabilization exercises and instructions to help the person perform daily tasks and advance to the next functional level.

Avoiding the activities that produce the pain or stress the involved tendon is the first line of treatment.

  • RICE: Rest, Ice, Compression Elevation should be used to reduce the stress on the bursa.
  • NSAIDS (Non steroidal anti-inflammatory drugs) to reduce pain and inflammation.
  • Injection of steroids may be necessary to reduce inflammation of the involved tendon
  • Immobilization, strapping or bracing may be beneficial to rest the tendon and promote healing.

Prognosis

In general patients respond well to conservative treatment of knee tendinitis. It is important that once the pain and inflammation is reduced, and motion and strength are restored, the patient gradually returns to full activities. Instruction in daily activities or sport performance is helpful for reducing a reoccurrence of tendinitis. In most cases, full return to activity will take from 2-6 weeks depending on the severity of the tendinitis. As a preventive measure individuals should:

  • Warm Up: warming up prior to physical activity is important in preparing the muscles and tendons for the work required of them. A 5-10 minute warm-up elevates the body temperature, increases the circulation to the muscles and tendons and raises the heart rate. Elevating your body temperature and increasing the circulation will also make the muscles and tendons more pliable for stretching.
  • Stretching: stretching regularly in addition to before and after activity will reduce the chances of developing tendinitis. Stretching will also improve and maintain the elasticity and flexibility of muscles and tendons. Hold stretches for 20 seconds and do not bounce. Remember, as tendons get older they lose flexibility. It is part of the aging process.
  • Strength: performing a regular strength program will keep muscles strong enough to absorb the stresses placed on them. Just running or playing a sport does not prepare your muscles for the impact forces involved in these activities. Remember, as people age they naturally get weaker.
  • Training: avoid sudden increases in your training program. Gradually progress your training program to avoid injury.
  • Foot Wear: in weight bearing or impact activities proper footwear is crucial to reduce and distribute forces properly.

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The Bridgewater Location is excellent! Every single staff person is on point. From day one when I called to schedule my first appointment and throughout my treatment staff were helpful, professional, and overall a caring and compassionate team. Their professionalism and caring was evident not only in my treatment, also in the treatment of other patients. Being in a room with multiple treatment stations you cannot help but notice the care received by other patients. My ankle is 100% better and if I ever need PT again I would not hesitate to return. I was always a part of the therapy process, if I had questions they were answered. If I wanted to improve my ankle health at home I was provided clear instructions for exercises. Staff were skilled and knowledgeable. I highly recommend this location to family and friends.

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"Twin Boro Piscataway/South Plainfield is great! I was treated for occipital neuralgia and posture issues. Aside from performing wonderful treatment, everybody there is super friendly and accommodating (you will always be greeted with a smile) and also very focused and helpful! Bri is a knowledgable and experienced physical therapist who is not only a great PT, but also one of the friendliest people you will ever meet. Her pacing with my various exercises was perfect, as she pushed me, but not to any point that was uncomfortable for me. I enjoyed the variety of exercises and treatments, from heat and stim to exercises with weights and stretch bands. I thoroughly enjoyed going in 3 times a week to be treated by Bri. It is clear that she cares about and wants the best for her patients, with her passion and expertise for physical therapy! My posture has gotten much better and the headaches and pain I used to experience have completely disappeared after 3 months at Twin Boro. 5/5 I would recommend Twin Boro Piscataway/South Plainfield to anyone seeking physical therapy."

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