Ballet dancers begin their careers and practice sessions at the barre, where they perform stretches and exercises. Even experienced dancers use the barre. Dancers work on turnout, rotating their thighs outward so their heels meet at a 180 degree angle. This allows them to achieve five standard foot positions. Other common ballet terms are plié, bending the knees with legs turned out, and pirouette, spinning the entire body while standing on one foot, which can involve multiple rotations.