There's a fad going around, especially in the NBA to use "Cryotherapy" to reduce healing time and relieve pain and fatigue. The patient is placed in a chamber, which is lowered to -166 degrees Celsius (107 Kelvin), for about five minutes. There are many reported benefits, but I haven't been able to find anything to legitimize the treatment beyond anecdotes from players, coaches, and company representatives, nor have I found any skeptical debunking.
Is cryotherapy an accepted, evidence-based, medical modality, an unproven possibility, a pipe dream, or a fraud?