This tactical drill teaches players in defense to play into open space, rather than consistently giving their opponents at the net easy balls by hitting directly towards them.
The defending player must target specific areas to put the attacking players under pressure: along the down-the-line fence, between the two players in the gap down the middle, or towards the cross-court fence.
With the volleyers seated on chairs and unable to move from their positions, they will only be able to reach balls that the defender has placed poorly.