Players lay down on the floor and swing on their chest, raising their arms and legs alternately.
This drill is great for preparing players for sliding on their chest when diving and digging.
If players find it difficult to begin with, it may be helpful to pull their legs upwards so they are only having to work on raising their arms.
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.