Players start lined up on the baseline. Firstly, they run to the net, touch it and return to their starting point. Then, they imitate a jump serve, on landing they run forward and imitate a spike. To finish they continue running to the net and imitate a block. They then return back to their starting point.
As there are many jumps the warm up drill should be carried out a moderate tempo, rather than getting them tired too early in the session. Get your players to take care and do this with a proper technique.
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.