Supple, limber, lithe, lithesome, lissome can all apply to bodily movements and mean showing freedom and ease in bending and twisting.
Supple implies great flexibility of muscles and joints, perfect muscular coordination, and rapidity yet smoothness in change of posture or movement.
Limber also implies great flexibility of muscles and joints and the power to move quickly or easily, but it carries no clear suggestion of grace or of muscular coordination.
Lithe is applied chiefly to persons or animals that are slender, supple, nimble, and usually graceful in movements.
Lithesome may suggest an agility and vigor that makes for sure graceful movement.
Lissome tends to suggest a light easy supple grace in bearing or in movement.