MARK HARRINGTON, chief player welfare and rugby services officer at World Rugby, explains the rationale behind trialling a size 4.5 ball in the female game.

World Rugby is constantly reviewing the game for all the stakeholders.
Last November, our ‘Shape of the Game’ meeting got all of the big hitters in the same room.
Union CEOs, team coaches, competition owners, referees and players were there at the meeting.
Over the course of two days, we discussed issues such as the current game-metrics and trends, medical and research issues and how to make the game more attractive to new audiences.
One clear theme from players, coaches and match officials was speeding up the game.
We can now see action taken on shot clocks, huddling at the lineout and the foul-play review bunker.
We ran a similar exercise at our women’s high-performance meetings, attended by head coaches, high-performance managers, referees and competition managers.
"The group agreed a smaller size needed to be trialled. But that is easier said than done..."
One discussion area which emerged from this gathering was the enormous array of analytics now being produced from the game.
Player welfare was at the top of the agenda. We have long been keen to move into the instrumented-mouthguard space and for the women’s game to be flagbearers for the detail it can give us around contact load and match dynamics.
In the latest WXV international tournaments, all teams wore instrumented mouthguards. That will give us a massive data set. There are also analytics from all, bar one team, in last year’s Women’s World Cup.
We had a good discussion about ball size, and, collectively, the group agreed that a smaller size needed to be trialled. That, however, is easier said than done.
To put a different-sized ball into one competition, as a trial, means that players who play across more than one level will have to adjust.
For example, if it were trialled in the Allianz Premiership, any player who stepped up into their international team would be disadvantaged.
Or register and unlock 2 free articles,
receive our weekly newsletter, and
get a FREE coaching e-book.
Or if you are already a subscriber login for full access.


In a recent survey 89% of subscribers said Rugby Coach Weekly makes them more confident, 91% said Rugby Coach Weekly makes them a more effective coach and 93% said Rugby Coach Weekly makes them more inspired.
Get Weekly Inspiration
All the latest techniques and approaches
Rugby Coach Weekly offers proven and easy to use rugby drills, coaching sessions, practice plans, small-sided games, warm-ups, training tips and advice.
We've been at the cutting edge of rugby coaching since we launched in 2005, creating resources for the grassroots youth coach, following best practice from around the world and insights from the professional game.