Bears prepare for cold indoors

LAKE FOREST, Ill. -- The Chicago Bears may be preparing to battle the Minnesota Vikings in frigid conditions Monday night, but coach Lovie Smith opted to conduct practice Thursday inside the Walter Payton Center.

"As a general rule, if we're going to play outside we're going to practice at least one day outside, which we'll do," Smith said. "We have a plan for the rest of the week. Today we wanted to go in [the Walter Payton Center], we may go in again [Friday]. We'll get one day in outside this week."

The Bears practiced almost exclusively outdoors the past few weeks, but Smith feels working out in the warmth of the bubble could pay dividends down the road.

"I think you can concentrate a little better when you are inside. For us, we're going to play on an artificial surface, so that's an advantage for us, instead of playing out there on the grass. I think it's fairly obvious what the advantage is inside this time of the year, that's why you have those indoor facilities."