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Calf Strain (Gastrocnemius)

Injuries > Lower LegCalf Strain (Gastrocnemius)

 

(Also known as Calf Tear, Torn Calf Muscle, Strained Calf Muscle, Pulled Calf, Gastrocnemius Strain, Gastrocnemius Tear, Torn Gastrocnemius)

 

What is a calf strain?

A calf strain is an injury characterized by tearing of one or more of the calf muscles and typically causes pain in the back of the lower leg.

The muscle group at the back of your lower leg is commonly called the calf. The calf comprises of 2 major muscles one of which originates from above the knee joint (gastrocnemius) the other of which originates from below the knee joint (soleus). Both of these muscles insert into the heel bone via the Achilles tendon (figure 1).

During contraction of the calf, tension is placed through the calf muscle. When this tension is excessive due to too much repetition or high force, the calf muscle can be torn. This is known as a calf strain.

Tears to the calf muscle can range from a small partial tear whereby there is minimal pain and minimal loss of function, to a complete rupture which may require surgical reconstruction.

Calf strains range from grade 1 to grade 3 and are classified as follows:

  • Grade 1 Tear: a small number of fibres are torn resulting in some pain, but allowing full function.
  • Grade 2 Tear: a significant number of fibres are torn with moderate loss of function.
  • Grade 3 Tear: all muscle fibres are ruptured resulting in major loss of function.

The majority of calf strains are grade 2.


Causes of a calf strain

Calf strains commonly occur due to a sudden contraction of the calf muscle. This frequently occurs when a patient attempts to accelerate from a stationary position, when jumping or when lunging forwards such as while playing tennis, badminton or squash. Calf strains are also commonly seen in running sports such as football and athletics. Occasionally they occur due to gradual wear and tear associated with overuse. This may be due to activities such as repetitive jumping, distance running or walking excessively (especially up hills or on uneven surfaces).


Signs and symptoms of a calf strain

Patients with this condition usually feel a sudden sharp pain or pulling sensation in the calf muscle at the time of injury. In minor strains, pain may be minimal allowing continued activity. In more severe cases, patients may experience severe pain, muscle spasm, weakness, and an inability to continue activity. Patients with a severe calf strain may also walk with a limp or be unable to weight bear on the affected leg.

Patients with this condition may experience pain during activities such as walking (especially uphill), going up and down stairs, running, jumping, hopping, or standing on tip toe. It is also common for patients to experience pain or stiffness after these activities with rest especially upon waking in the morning. Swelling, tenderness and bruising may also be present in the calf muscles. In cases of a grade 3 tear a visible deformity in the muscle may be evident.


Diagnosis of a calf strain

A thorough subjective and objective examination from a physiotherapist is usually sufficient to diagnose a calf strain. Further investigations such as an MRI scan or Ultrasound may be required, in rare cases, to confirm diagnosis and assess the severity.


Treatment for a calf strain

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Prognosis of a calf strain

With appropriate management, patients with a minor calf strain can usually recover in one to three weeks. With larger tears, recovery may take four to eight weeks or longer depending on the severity. In cases of a complete rupture of the calf muscle surgery may be required with intensive rehabilitation to follow. Return to sport or activity may then take 6 months or longer.


Contributing factors to the development of a calf strain

There are several factors which can predispose patients to developing a calf strain. These need to be assessed and corrected with direction from a physiotherapist. Some of these factors include:

  • poor calf flexibility
  • inappropriate training
  • poor biomechanics or foot posture
  • inadequate warm up
  • ankle joint stiffness
  • calf weakness
  • inadequate rehabilitation following a previous calf strain
  • decreased fitness
  • fatigue
  • neural tightness


Physiotherapy for a calf strain

Physiotherapy for patients with a calf strain is vital to hasten the healing process, ensure an optimal outcome and minimise the likelihood of recurrence. Treatment may comprise:

  • soft tissue massage
  • electrotherapy (e.g. ultrasound)
  • anti-inflammatory advice
  • the use of heel wedges or crutches
  • Achilles tendon taping
  • stretches
  • dry needling
  • joint mobilization
  • ice or heat treatment
  • exercises to improve strength, flexibility or balance
  • hydrotherapy
  • education
  • activity modification advice
  • biomechanical correction
  • a gradual return to activity program


Other intervention for a calf strain

In the event of a complete rupture of the calf muscle surgery if often indicated. It is vital that all patients with a potential calf muscle complete rupture seek physiotherapy or medical assessment as soon as possible to determine if the muscle is completely ruptured. This is vital as delayed treatment may result in a poor outcome due to shortening of the torn calf muscle. The patient's doctor or physiotherapist may then refer on to an orthopedic specialist if it is warranted clinically.

Surgical repair of the ruptured calf muscle is generally considered the most appropriate form of management for active individuals seeking the highest level of function. This often involves a period of immobilization in a plaster cast for one to two months following surgery and a rehabilitation period of three to six months involving extensive physiotherapy.

Conservative management of ruptured calf muscles may be appropriate for older individuals. This involves immobilizing the calf in a shortened position in a cast for approximately four weeks. The calf is then gradually stretched and strengthened over time.


Exercises for a calf strain

The following exercises are commonly prescribed to patients with this condition. You should discuss the suitability of these exercises with your physiotherapist prior to beginning them. Generally, they should be performed 3 times daily and only provided they do not cause or increase symptoms.

Your physiotherapist can advise when it is appropriate to begin the initial exercises and eventually progress to the intermediate and advanced exercises. As a general rule, addition of exercises or progression to more advanced exercises should take place provided there is no increase in symptoms.


Initial Exercises

Calf Stretch with Towel

Begin this calf stretch in long sitting with your leg to be stretched in front of you. Your knee and back should be straight and a towel or rigid band placed around your foot as demonstrated (figure 2). Using your foot, ankle and the towel, bring your toes towards your head until you feel a stretch in the back of your calf, Achilles tendon or leg. Hold for 5 seconds and repeat 10 times at a mild to moderate stretch provided the exercise is pain free.

Exercises for a Calf Strain - Calf Stretch with Towel

Figure 2 - Calf Stretch with Towel

Resistance Band Calf Strengthening

Begin this exercise with a resistance band around your foot as demonstrated and your foot and ankle held up towards your head (figure 3). Slowly move your foot and ankle down against the resistance band as far as possible and comfortable without pain, tightening your calf muscle. Slowly return back to the starting position. Repeat 10 20 times provided the exercise is pain free.

Exercises for a Strained Calf - Resistance Band Calf Strengthening

Figure 3 Resistance Band Calf Strengthening (left calf)

 


Intermediate Exercises

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Advanced Exercises

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Other Exercises

For other exercises that can help to accelerate recovery from a strained calf  'Become a Member'

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Rehabilitation Protocol for a calf strain

For a detailed, step by step rehabilitation protocol for a strained calf  'Become a Member'

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Find a Physio for a calf strain

Find a physiotherapist in your local area to treat a calf strain


Physiotherapy products for a calf strain

Some of the most commonly recommended products by physiotherapists to hasten healing and speed recovery in patients with this condition include:

    1. Massage Balls & Foam Rollers (for self massage)

To purchase physiotherapy products for a calf strain, click on one of the above links or visit the PhysioAdvisor Shop.


More information


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Relevant Anatomy of a Calf Strain

Figure 1 - Relevant Anatomy of a Calf Strain

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