The drafty drill sees Ireland's double British Open champion enter a TARDIS like chamber, which is cooled by liquid nitrogen to temperatures between -120 and -140 degrees Celsius.
He will then experience what's known as a "short exposure" which lasts for two to three minutes.
Cryotherapy was developed in 1978 by Toshima Yamauchi in Japan but is a relatively new treatment in professional sports medicine.
"Part of our investigations included taking serum and blood tests to monitor enzymes related to muscle damage," explains Hennessy, who ran a research program into cryotherapy.
"What we saw is that they returned to normal when players took part in cryotherapy compared to when they didn't. It improved the inflammatory response, which led to a better recovery.
"We've also seen heart rate variability -- which is a marker of stress -- returned to the baseline quicker if the athlete is exposed to cryotherapy.
"We noticed that sleep quality is also improved straight away by an exposure to cryotherapy.
"Individual athletes would report, 'I just had a good, deep sleep and I feel very good.' It's also possible to get a quality of sleep number by attaching a monitor to the wrist."
In a four-year study of 156 rugby players, 95% said cryotherapy had a positive effect on their recovery after training.
"Many of those that take it will tell you afterwards that they feel elated, they feel a rush of energy and a high as happy hormones are released," adds Hennessey.
"They were dragging the guys out of bed before breakfast sticking them through cryo, they'd do some gym work in the morning, then go in for another session before lunch, do some work on the pitch and then another treatment at the end of the day.
"The mobile unit is predominantly used to stimulate a quicker recovery after training or games."
It costs up to $1,500 to hire the six-meter long unit for a day in the deep freeze.
"We find our bookings come in around the Champions League fixtures," says Bridge. "It was in heavy use over the Christmas period because there was such a heavy football program."