Players take it in turn to run and squeeze through the small openings between the blue players, being strong to drive through the blocking man.
Blue players must keep their arms down when blocking the running man and only use their core strength to prevent the man running through (no shoulder barges).
Look for strong, driving play. The running players should have their arms slightly bent to brace for impact
"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.