The 35-year-old signed a new one-year deal with the Red Devils in April.
He said: “I know that playing two or three times a week it is not going to happen anymore. So you just have to be ready when needed.
“It is accepted, definitely, given there are that many games and at our age we have to be ready when the manager needs us.
“You train every day and I did not miss a day’s training last season, which was good. I managed to avoid injury.
“When you are at a club like this you have to be capable of doing that, especially like last season when we had that many injuries.”
