Wallabies coach Dave Rennie has questioned the logic of World Rugby’s new measures to curb injury that include a full-contact training cap of 15 minutes per week.

The fresh guidelines, dewadominoqq core default formed after a study that involved 600 players from around the world as well as medical, conditioning and performance professionals, also recommended no more than 40 minutes of controlled contract training and 30 minutes of set-piece work each week.

The study found that between 35-40 per cent of injuries occur during training and that a drop from about 21 minutes of full-contact training currently averaged would have positive spin-offs on injury and short and long-term player welfare.

According to a World Rugby statement the recommendations, which are not mandatory, attempt to “strike a balance” so players, particularly those moving between country and club, can be prepared to perform but avoid an elevated injury risk at the same time.

Rennie estimated the Wallabies did eight minutes of contact work on Tuesday, but said a 15-minute weekly cap could prove tough to police and detrimental to the overall goal.

“Who’s timing it? I’m sure there’s a lot of work going into coming up with these numbers but I’m not certain how that will pan out,” he told reporters before Saturday’s Rugby Championship clash with Argentina.

“Thirty-five to 40 per cent of injuries happen at training, which means 60 to 65 happen at games.

“And you have to make sure from a training point of view you’re getting the conditioning and contact load into them so that that they can deal with it on game day and have the technique required.

“There’s focus around reducing injuries but the most important thing is ensuring our athletes have the skills and knowledge to deal with the contact.”

The change, which follows the NFL’s decision to place limits on full-contact training in 2011, is World Rugby’s latest effort to make the sport safer.

Tougher officiating of high and dangerous contact in tackles and collisions continues to be a talking point at all levels, with players now aware a red card and lengthy suspension is likely for any contact to an opponent’s head.

World Rugby director of rugby and high performance Joe Schmidt, who coached Ireland, and former All Blacks centre Conrad Smith, now International Rugby Players head of player welfare, both said the 15-minute limit would have been irrelevant in their experience.

“While there is a lot less full-contact training than many people might imagine, it is our hope that having a central set of guidelines will further inform players and coaches of key considerations for any contact that is done during training,” Schmidt said.

“We recognise that community level rugby can be an almost entirely different sport in terms of fitness levels, resources and how players can be expected to train, but the guidelines can be applied at many levels, especially the planning, purpose and monitoring of any contact in training.”