Ankle sprains are common, accounting for around one in four sports injuries, and happen when the foot twists, rolls or turns beyond its normal motions. A great force is transmitted on landing and the ankle can be sprained if the foot is planted unevenly. This causes the ligaments to stretch beyond their normal range and, if the force is too strong, they can tear. A 'pop' may be heard and swelling soon results, leading to bruising and soreness.
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