NYT had an article on this and a similar thing - cryotherapy chambers. To date, no one has found a statistically significant link between it and general health indicators like you describe, although it was shown to slightly reduce muscle inflammation after a tough workout.
http://well.blogs.nytimes.com/2011/09/07...-recovery/
http://well.blogs.nytimes.com/2011/09/07...-recovery/
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