Percy Harvin returned to Winter Park this week after missing two games because of another migraine episode.

Harvin said he spent last week at the Mayo Clinic in Arizona, visiting a specialist who has treated other NFL players for migraines, including former Denver running back Terrell Davis. Harvin said he "definitely" plans to play Monday night against the Chicago Bears.

Harvin said the doctors came up with a new plan for dealing with his migraines, which he has suffered from since childhood.

"Feeling great now," Harvin said Friday in the locker room before practice. "I had a bad two weeks. I think the last week was more precautionary, seeing how I react to a lot of the new medicines I was on." Harvin said he flew to the Mayo Clinic in Scottsdale after meeting with Coach Leslie Frazier and owner Zygi Wilf. "I think it got to the point where a lot of the players and coaches were starting to see just how bad it was," he said. "Coach sat down with Zygi and we all had a meeting and we found the best doctor we could possibly find. I went there for a week and we came out with some positive things. The doctor was real confident. He's treated a couple of NFL players, Terrell Davis being one of the guys, so I felt real confident coming out." Harvin has missed numerous practices and three games because of migraines in his two NFL seasons but he said he tries to remain positive despite the uncertainty of when they will occur. "You get frustrated but then I go to the doctor and I see people who can't even get out of the bed every single day," he said. "I see I have it good. I realize I'm blessed. It's just something that's going to happen. Unfortunately, you can't eliminate it from happening so hopefully we can slow it down. "Anybody who suffers migraines [knows] you can't completely stop them. If you can have them not drag on two or three days, I think that's the key." Harvin said he went through a comprehensive study in Arizona to try and determine possible triggers and a course of action when they occur. "It was everything," he said. "We covered pretty much every base so we've got a plan to prevent it, we've got a plan if it comes and we've got a plan if it gets real bad. Hopefully we've covered everything. I'm real confident. These last couple days I've been feeling real good so I'm looking forward to getting back on the field." Harvin was diagnosed with sleep apnea this season and was treated for it, but he said the condition "hasn't been significant in any of the studies that these last doctors have seen." Harvin also said his conditioning is not an issue despite the missed practice time and games. "A lot of the players say I look more explosive now than I did before I left," he said. "It was just good to get out there and not have a foggy head or a slight headache. It was good to get out there and be able to play with a clear mind." Peterson sitting again Running back Adrian Peterson missed a second consecutive day of practice Friday because of a sprained ankle and knee contusion, raising doubt about whether he will play Monday night against the Bears. Quarterback Brett Favre also wasn't on the field, making it nearly certain that Joe Webb will get the start. Vikings interim coach Leslie Frazier expressed hope that Favre might be able to return this season but it's looking like the injury to his throwing arm almost certainly will end his year. The only question now is whether Favre will be placed on injured reserve? Also sitting out Friday were safeties Tyrell Johnson (knee) and Jamarca Sanford (concussion) and left guard Steve Hutchinson (broken thumb).