Three groups at each corner of an 100m square
First group of 3 (A) start running towards (B), handballing sideways in a line
Players must be running at near full pace and call loudly for the ball
Group (A) finish by handballing to the centre player in group (B)
Group (B) carry the ball to group (C) with handball, then group (C) work the ball to group (D) who complete the loop by working to (A)
The middle player in the group is always given the final handball
Increase the intensity by introducing a second ball if there are enough players
