One player in the middle spikes the ball to a player, who will set the ball up and another player must set it back to the spiker.
As players almost do not run they cool down their muscles but they still work on technique.
"It is not only useful for staff who are experienced but a valuable tool for those subject staff who have to take teams."
The variety of sessions across sports - sometimes we steal session ideas from one sport and use them with another.
As we enter the business end of the competition, we take a look at the remaining eight teams and the key talking points surrounding each side.