The Kathak Repertoire:

"... the dancer tries to control  the sound of  the ankle bells  and restrict the sound to the jingling  of one or two bells on her ankles or the jingling of the entire hundred to two  hundred bells. This is indeed a challenging  part of the dancer's  training, because while executing these patterns and maintaining the right axis of the body and giving various emphasis on the round of the bells, the dancer must be absolutely static from the torso upwards. This is a difficult discipline for the dancer, because the feet, when tired have a tendency of seeking relief through a free use of the pelvic region. The charm of the dancer is in the seemingly static figure producing dynamic sounds."

excerpted from Web India