Example:When a figure skater glides on one foot, the leg that is on the ice is called the skating leg. The leg that is lifted is called the free leg. When a skater lifts his or her free leg, he may be asked by a figure skating coach to also lift up the hip that corresponds to the free leg. Dropping the free hip may appear ugly, but lifting the free hip will give the skater a pleasing appearance as he or she performs a move.
In this photo, a young figure does an attitude which is a figure skating move taken right out of ballet. Her free hip is lifted as she performs the move. If she dropped her free hip, the move would not appear to be pretty, so lifting the free hip is necessary to properly perform an attitude.