Among the players. The sender is usually sent in the rhythm of moving forward to increase the sending and relying on hand to handle gently in rhythm that help the ball to drop precision.
Between players Sender often sends the rhythm move forward to increase power output. And the hands holding the timing of release of the ball to help with precision.
Between the players. The sender is often sent at a pace that stepped forward to increase the delivery. Hand held and used in the release the ball to help with accuracy.