It's HQ to global Nike empire, and more than 7,000 staff work there
Entire site covers 2m square feet; campus comprises 17 buildings
They are named after stars such as John McEnroe and Tiger Woods
Both United and Manchester City have used the complex before
Rooney to work on SPARQ (speed power agility reaction quickness)
Rooney said that concerns over the club's squad strength were behind his decision to seek an exit, but then made the shock U-turn after speaking to manager Sir Alex Ferguson and the club's owners who he stressed "convinced me this is where I belong".
Phelan did raise the possibility that Rooney could be back for the club's Premier League home match with Wigan on 21 November, if his conditioning work away from the glare of the British media goes well.
"We have the facilities [at Carrington]," said Phelan. "But we just thought it might be in the interests of him and the club to have a change of scenery for a little while.
"He has had a lot of attention lately and we want to give him the best opportunity he possibly can to be in good shape when he returns.
"If that goes according to plan, he will be available when he returns."
Ferguson, who handed over news conference duties to Phelan ahead of the home match against Wolves after picking up a virus, estimated on Tuesday that it would be another three weeks before Rooney is fit to return from his ankle injury.
Rooney, who had a hugely disappointing World Cup, is likely to miss England's friendly with France on 17 November.
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