Players lean on their heels and hands, with their fingers pointing towards their feet.
Arms should be stretched underneath shoulders and pelvis raised so that their body is in one line.
Hold for 30 sec, rest 30 sec
Repeat 3-5 times.
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.