Players stand in pairs with one ball. In groups of four, the first two start with the ball, while the two reserve players stand behind them.
On the coach's signal, the first players start with the ball. Teammates hold the ball with their hands against each other and run to the net, touch the net, and return to their reserve teammates.
The ball is passed on, and the second team starts and does the same.
Repeat the exercise, but all players sit on the ground.
On the coach's indication, the first groups depart.