Oliver Bee RMTRegistered Massage Therapist

Massage therapy · Kitchener–WaterlooAnkle Sprains (Medial and Lateral)

Ankle & Lower Leg

What It Is

Two line drawings of the ankle bones: from the outside, with short ligaments running from the lower end of the fibula down to the foot, and from the inside, with a broad fan-shaped ligament spreading down from the inner ankle bone.
The small ligaments on the outside of the ankle take most sprains; the broad one on the inside is much harder to strain.

Ankle sprains are one of the most common orthopaedic injuries and occur during a sudden, awkward twisting movement of the foot. As a result of these movements, the ligaments (strong bands of tissue that hold the ankle bones together) and other soft tissues of the ankle are stretched or torn.

An ankle sprain occurs when the ligaments of the ankle are stretched beyond their normal limits (AAOS, n.d.). Sprains are graded depending on the severity, and it may be advised to get a professional opinion.

Grade I sprains are when there is slight stretching and very small tears in the ligament. There are no signs of ankle instability. The ankle may be mildly swollen, bruised and tender, but there is usually little or no pain when you put weight on it.

Grade II sprains occur when there is partial tearing of the ligaments. There is moderate tenderness, bruising and swelling, mild pain when you put weight on the ankle, and the ankle may feel slightly unstable or loose.

Grade III sprains occur when there is a complete tear of the ligament. The ankle will be very swollen, tender and bruised, putting weight through it will be very painful, and the ankle will be clearly unstable (AAOS, n.d.). Even so, nearly all of these sprains can be treated without surgery (AAOS, n.d.).

On the inside (medial) side of the ankle, the deltoid ligament supports the ankle. On the outside (lateral) side there are three ligaments: the anterior talofibular, posterior talofibular and calcaneofibular ligaments.

The most common ankle sprain occurs when you roll over the outside of your ankle (the foot turns inwards). This is known as an inversion (lateral) sprain, and around 90% of ankle sprains are this type (AAOS, n.d.).

If you roll on the inside of your ankle (the foot turns outwards, which is less common), you may suffer an eversion (medial) sprain.

Causes of Ankle Sprains

Lateral ankle sprains often happen during weight-bearing activities when sudden changes of direction are required, when landing from a jump, or when walking or running on uneven surfaces. Sports such as basketball, tennis, football and trail running are common examples. The foot turns inwards too far, which stretches or tears the ligaments on the outside of the ankle (the anterior talofibular and calcaneofibular ligaments).

The mechanism of injury for medial ankle sprains is the opposite. The foot turns outwards too far, which damages the deltoid ligament on the inside of the ankle (AAOS, n.d.).

A previous ankle sprain, poor balance, and shoes that give little support or have slippery soles all increase the risk of a sprain (AAOS, n.d.).

Not a diagnosis — for more information, contact me or another trusted healthcare provider.

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