"No worries, I'll be sweet mate."

That's all it took for injured NSW five-eighth Trent Barrett to calm the nerves of thousands of Blues supporters desperate to know if the recalled playmaker would be fit enough to tackle Queensland in Wednesday night's must-win second State of Origin clash.

Barrett's words were all that fans and the NSW coaching staff had to go on, however, after the 31-year-old spent the majority of the Blues' training run at Gosford's Bluetongue Stadium in the dressing rooms receiving treatment on his ailing back.

The injury is a recurrence of an old strain suffered earlier this year when he attempted to lift a lawnmower onto the back of a ute while moving house.

He will continue to get around-the-clock treatment on his return home after the Blues broke from camp for the weekend, Monday set to be D-Day in determining not only Barrett's availability but that of bench utility Craig Wing.

Wing failed to run at full pace in the wet conditions as he protected his injured hamstring, and was pulled from the session early as a precaution.

The other injury concerns - Jamie Lyon (ankle), Robbie Farah (ribs) and Paul Gallen (shoulder) all trained strongly and are now considered certain starters.

"He's coming along well, at a pinch he'd be right in a day," NSW doctor David Givney said of Barrett.

"He'll be right ... we'll get the Cronulla physio onto it, he's going to have intensive physio and we're planning to have him training on Monday.

"Wingy still feels not 100 per cent with his hamstring so he's also doing physio over the weekend and he'll have another run on Monday and we'll see how it goes.

"The two we were worried about were Gallen and Robbie and they both came through 100 per cent."

Team of the Century halfback and Blues assistant coach Andrew Johns ran in Barrett's place during Saturday's opposed session against park football side Wyong, coached by former Parramatta, Norths and Souths front-rower Paul Stringer.

Stringer said Johns left quite an impression on his young side.

"A few of the boys said 'let's back him for first tryscorer on Wednesday night, he'll be playing'," Stringer said.

"He looked all right out there but he'd probably be the first to admit when they start sending the big boppers his way and he's tackling, he's not going to running around doing what he's doing (at training)."

While all the conjecture over Barrett stole the headlines, his Blues teammates seemed unconcerned at reports the veteran five-eighth would not be fit to take on the Maroons in a match NSW must win if they are to avoid a record fourth straight series defeat.

"It's not an ideal situation but everyone's reacted well," O'Donnell said.

"The training's been good and all the medical staff's pretty confident that he'll (Barrett) be good.

"He's only missed yesterday and everyone's pretty confident that he's going to be good to go.

"He's been trying to stay pretty positive and that's the vibe I'm getting from him. He's a pretty experienced guy and I'm sure he'll be able to handle it."

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