The players are divided into two teams, opposite sides of the net. Two players from each team are at the baseline and one substitute player (or more, in line) behind them waiting their turn; the same on the other side. The coach is close to the net post.
Drill:
The coach sends a ball to one of the teams; players rally; every player who hits the ball moves out and the substitute (third player) takes her place. No player is allowed to hit the ball twice in a row. They play as a team.
First to earn 21 points wins.
Note:
This drill keeps players active, moving in and out of the game, which is perfect for cardio classes.