Packers players using cryotherapy to aid in recovery process

Nitrogen is used to produce extreme cold temperatures in “cryosaunas.”A crysosauna machine at Cryotherapy of Wisconsin in Green Bay. The sauna uses extreme cold to help in the recovery process.Green Bay — Beyond the glass door, front foyer and dividing wall, on the other side of two changing rooms that house white bathrobes and four colors of slippers, sits a futuristic chamber from which clouds of nitrogen billow.

The origin of the fog resembles a space-age soda can or a metallic MRI machine gone vertical, and the front door opens to reveal a small platform that, operated by a technician, levitates so that only the patient's head and neck are visible above the brim of the chamber.

Inside,…