As basketball demands quick and explosive movements to be made by players both running and jumping, the most common injury sustained is to the ankle. Ankle sprains occur with some frequency, either as a result of the player landing in a position where the foot is not stable, causing the ankle to roll outward on impact, or where the player lands upon another player's foot, which also creates an uneven surface and causes the foot and the ankle to roll outward. It is a rare competitive basketball player who has not sustained a number of at least minor ankle sprains in their career. Many players, especially at the upper echelons of competition, wear an ankle support or brace as a preventative measure; alternatively, one or both ankles will be taped to provide additional support to the ankle.
Player size is also a factor in the severity of an ankle sprain. In the National Basketball Association (NBA), the average player is 6 ft 8 in (2.03 m) tall, weighing approximately 225 lb (102 kg); in the elite European leagues, average player sizes are only somewhat smaller. The greater size of these athletes, coupled with their general ability to leap higher than the average person, will magnify the forces applied to the ankle.
A less common, and potentially devastating, ankle injury is an Achilles