"the Patriots coaches have a room at Gillette Stadium with a float tank that simulates four to five hours of sleep in 40 minutes"

Says Josh McDaniels.

From a 2017 article:

Tom Brady is a proponent and reportedly keeps a float tank of his own at home to help him remain atop his game as he nears 40.

...

The edge, then, as players describe it, isn't necessarily in the relaxation experienced while in the tank. It's that those moments of relaxation lead to better sleep later on. Improved quality of sleep is a very good thing for an athlete, of course, since it's linked to improved reaction time, quicker physical recovery, and an increased capacity for learning.

And speaking of Super Bowl coverage:

There’s a dude on the street dressed as a bush, scaring people in downtown ATL...kind of feel like waiting around to see if he gets punched pic.twitter.com/67VEuz4eum

— gifdsports (@gifdsports) January 31, 2019