Injuries are common in ballet dancers because ballet consists of putting the body in unnatural positions. One such position is first position, in which the heels are placed together as the toes point outward, rotating, or "turning out" the legs. If First Position is done incorrectly it can cause knee problems, however, when done correctly (turning out with the hips rather than the knees) it should increase flexibility and reduce pressure on the knees. Meniscal tears and dislocations can happen at the knees when positioned incorrectly because it is easy to let the knees slide forward while turned out in first position. More Info below.