Players start by lying on their back on the baseline. When the coach whistles, they quickly get up and overhand pass the ball to themselves while moving forwards and backwards from the net.
The faster a player overhand passes the ball, the more time they have to prepare for the next pass.
Have the drill performed with players starting in different body positions such as sitting backwards or in a squat position.
New hitters rarely miss because of their arm. They miss because of their feet. Build a reliable approach, then time it with your setter.
When your hitter gets stuffed, five teammates standing and watching is how you lose the point. Good attack coverage turns a blocked ball into a second swing.
Coaches spend hours correcting arms in serve receive when the real fault is almost always the feet. Fix the movement and the platform fixes itself.