
This drill is working on backwards bumping and setting. The setter sets the ball over the net to the bumper. The bumper is turned around, and they backwards bump the ball over the net to the setter. The setter then sets the ball back and the cycle continues.
This practice has no coaching points
This practice has no progressions
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.