Jetlag is a very real thing that teams have to deal with. The Packers players will be tired from the trip to London from Green Bay. There is a six hour difference between London Time and Central Time. Putting that into perspective, the game kicks off at 2:30PM in London but at home, the time zone the team is used to, it will be 8:30AM. The players will be lacking rest that they are used to. That time difference will have an impact on the bodies of the players and throw off their circadian rhythms.
So what are the Packers doing to help with the time change and lack of rest?