Ankle fractures are named depending on the exact location of the fracture line. Lateral Malleolus and Medial Malleolus fractures can occur in isolation or together (Bi-Malleolar fracture), or with fractures of the back of the Tibia (Tri-Malleolar fractures).
A broken ankle may occur as a result of direct contact, either with another rider or your own bike. In some cases it may be due to an awkward landing.
If a bike lands on your ankle you can't do a great deal about it. Riding sensibly can help, but the most important thing is to make sure that you're fit enough to ride. If your fitness is good then you can concentrate throughout the race and you'll be less likely to make mistakes as fatigue is the cause of many accidents. An Ankle Brace can also help to reduce the risk of ankle injury.
Any suspected broken ankle needs to be urgently transferred to hospital for assessment by a specialist trauma doctor. 'Open' fractures, where the bone fragments push through the skin, are patently obvious but all serious ankle injuries require a full assessment and an x-ray evaluation.
After a period of immobilisation in a plaster or Removable Plastic Cast, the doctor will indicate that the fracture has healed sufficiently. Rehabilitation under the supervision of a physiotherapist is essential. Ankle pumping exercises are excellent for restoring ankle range of motion and these can be progressed to Resistance Band exercises to build strength around the ankle.