http://orcid.org/0000-0003-1251-9865Neil Hay1, Annabel Kehoe2 1 Rugby Victoria, South Yarra, Victoria, Australia 2 British Columbia Rugby Union, Vancouver, British Columbia, Canada Correspondence to Neil Hay, Rugby Victoria, South Yarra, Victoria, Australia; neil.hay{at}haycapital.com.au Statistics from Altmetric.com Request Permissions If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service.