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Eagles running back Darren Sproles is using cryotherapy to stay fit during the offseason

The following is an actual photo that Darren Sproles posted to his Instagram feed, and not a scene from a science fiction movie:

As Sproles prepares for his final season in the NFL, he has become the latest of more than a few NFL players to use cryogenics as a way to stay in shape. Players from the Denver Broncos, Green Bay Packers and Minnesota Vikings, among others, have turned to the technology in recent years.

Cryotherapy involves standing in a full-body-sized chamber in nothing more than one's underwear as liquid nitrogen surrounds the torso and limbs.