jure(Offline)

Maybe it would be best if you wold read the original articles:
NOS inhibition increases bubble formation and reduces survival in sedentary but not exercised rats -- Wisløff et al. 546 (2): 577 -- The Journal of Physiology Online
Exercise and nitric oxide prevent bubble formation: a novel approach to the prevention of decompression sickness? -- Wisløff et al. 555 (3): 825 -- The Journal of Physiology Online

At least before buying the pills on internet

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VPMOpen - opensource decompression program
http://www.geocities.com/vpm.open/index.html