Tim McGraw's Extreme Workout [VIDEO/PHOTOS]

Last month I told you how Tim McGraw, and Kenny Chesney had sort of a competition between them about who was in better shape. Grace Potter, one of the opening acts on the "Brothers of the Sun Tour", says that it is Tim in better shape, without a doubt. We have some photos and video of his workout.

Grace said she sneaked a peek at him working out, and was blown away. He works out hard, lifting and throwing tractor trailer tires around. Someone posted some pics online the other day, so Tim posted one on his own at twitter @TheTimMcGraw... here it is.