Lie on your back.
Knees bent 90 degrees, feet pointing forward.
Hands in the neck.
Raise body up a bit.
15 to 20 times, hold for 2 seconds.
World Rugby has reportedly conceded Aaron Smith's disallowed try in the World Cup final should have stood.
"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.