The 36-year-old centre-back has been discussing how he was forced to adapt during his last years at Manchester United and beyond.
The 36-year-old left Manchester United on a free transfer this summer, joining Harry Redknapp at the R's for the coming campaign.
“No one is built to last forever, I understand that,” the former Manchester United defender told the Independent.
“It is part of the game and you have to play a different way. My last two years at United, I had to really adjust the way I played and play off different senses.
"I used to want to race forwards... my position will be different now. I will be trying to tell the guy on the ball not to play it into the channel. There are different ways of adjusting.”