VIDEO: Tendinopathy (Tendon Injury)

Tendinopathy (tendon injuries) can develop in any tendon of the body.

Typically, tendon injuries occur in three areas:

  • musculotendinous junction (where the tendon joins the muscle)
  • mid-tendon (non-insertional tendinopathy)
  • tendon insertion (eg into bone)

Non-insertional tendinopathies tends to be caused by a cumulative microtrauma from repetitive overloading eg overtraining.

 

What is a Tendon Injury?

Tendons are the tough fibres that connect muscle to bone. Most tendon injuries occur near joints, such as the shoulder, elbow, knee, and ankle. A tendon injury may seem to happen suddenly, but usually, it is the result of repetitive tendon overloading. Health professionals may use different terms to describe a tendon injury. You may hear:

Tendinitis (or Tendonitis): This actually means “inflammation of the tendon,” but inflammation is actually normal tendon healing response which can cause some tendon pain. This is known as the reactive phase and is a good tendon healing response.

The problem really occurs when you healing rate is less than your injury rate – known as tendon dysrepair – which is when tendinopathies can quickly deteriorate into the degenerative (cell death) phase. This is characterized by collagen degeneration in the tendon due to repetitive overloading. These tendinopathies therefore do not respond well to anti-inflammatory treatments and are best treated with functional rehabilitation. The best results occur with early diagnosis and intervention.

What Causes a Tendon Injury?

Most tendon injuries are the result of gradual wear and tear to the tendon from overuse or ageing. Anyone can have a tendon injury, but people who make the same motions over and over in their jobs, sports, or daily activities are more likely to damage a tendon.

Your tendons are designed to withstand high, repetitive loading, however, on occasions, when the load being applied to the tendon is too great for the tendon to withstand, the tendon begins to become stressed.

When tendons become stressed, they sustain small micro tears, which encourage inflammatory chemicals and swelling, which can quickly heal if managed appropriately.

However, if the load is continually applied to the tendon, these lesions occurring in the tendon can exceed the rate of repair. The damage will progressively become worse, causing pain and dysfunction. The result is a tendinopathy or tendinosis.

Researchers current opinion implicates the cumulative microtrauma associated with high tensile and compressive forces generated during sport or an activity causes a tendinopathy.

For example, in explosive jumping movements, forces delivered to the patellar tendon can be eight times your body weight. Cumulative micro trauma appears to exceed the tendon’s capacity to heal and remodel.

 

What are the Symptoms of Tendinopathy?

Tendinopathy usually causes pain, stiffness, and loss of strength in the affected area.

  • The pain may get worse when you use the tendon.
  • You may have more pain and stiffness during the night or when you get up in the morning.
  • The area may be tender, red, warm, or swollen if there is inflammation.
  • You may notice a crunchy sound or feeling when you use the tendon.

The symptoms of a tendon injury can be a lot like those caused by bursitis.

Tendinopathy Phases

The inability of your tendon to adapt to the load quickly enough causes tendon to progress through four phases of tendon injury. While it is healthy for normal tissue adaptation during phase one, further progression can lead to tendon cell death and subsequent tendon rupture.

1. Reactive Tendinopathy

  • Normal tissue adaptation phase
  • Prognosis: Excellent. Normal Recovery!

2. Tendon Dysrepair

  • Injury rate > Repair rate
  • Prognosis: Good. Tissue is attempting to heal.
  • It is vital that you prevent deterioration and progression to permanent cell death (phase 3).

3. Degenerative Tendinopathy

  • Cell death occurs
  • Poor Prognosis – Tendon cells are giving up!

4. Tendon Tear or Rupture

  • Catastrophic tissue breakdown
  • Loss of function.
  • Prognosis: very poor.
  • Surgery is often the only option.

It is very important to have your tendinopathy professionally assessed to identify it’s injury phase. Identifying your tendinopathy phase is also vital to direct your most effective treatment, since certain modalities or exercises should only be applied or undertaken in specific tendon healing phases.

How is a Tendon Injury Diagnosed?

To diagnose a tendon injury, your physiotherapist will ask questions about your past health, your symptoms and exercise regime. They’ll then do a physical examination to confirm the diagnosis. If your symptoms are severe or you do not improve with early treatment, specific diagnostic tests may be requested, such as an ultrasound scan or MRI.

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