"He had some soreness, which you would expect ... just from the inactivity," coach Brad Childress said after practice Friday.
"It's not going to slow me down," Peterson said of the soreness. "I'm going to be out there going full speed. It's just a matter of feeling what it's like when I get hit."
Despite the two-game absence, Peterson leads the league in rushing with 1,081 yards and is also first at his position for Pro Bowl votes by fans.
Receiver Troy Williamson also was deactivated with a concussion sustained during a kickoff return last week against the Giants. He practiced Wednesday, but sat out the rest of the week with headaches.
Robert Ferguson started in his place, and rookie Marcus McCauley got his second straight start at cornerback for the Vikings, who also made a switch in the starting lineup at defensive end.
Erasmus James replaced Ray Edwards at right defensive end. Edwards started the first 11 games this season while James worked his way back from a serious knee injury.
The Lions also did some shuffling on the defensive line, starting Dewayne White at right end in place of Kalimba Edwards and sliding Jared DeVries over from right end to left end.
Copyright 2007 by The Associated Press. All Rights Reserved