The player starts in the 'press-up' position with one hand balanced on a ball.
The player then lifts the ball and throws it in the air so it bounces.
He/she then has to catch it with the opposite hand by changing the supporting arm.
To make sure that a player's core muscles are being used at the maximum level they should not bend their hips and keep a tense body shape.
As players get stronger ask them to do the drill supported by their forearm.
Note: this is difficult to do when a player's arms are sweaty because of the chances of slipping.
Create a resolution to develop your coaching confidence by seizing the opportunity to discover new drills, turn ideas into action and seek advice from the coaching community.
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."