New Study Result - excersise after Diving

[Alwassia]

Hello,
A friend send me this link on the web could some one let me know if that looks crediable as it goes pritty much against what i understood till now.

http://highwire.stanford.edu/cgi/medline/pmid;16780236

[Fred]

Does that mean I now have no excuse when the shot needs pulling up.

[Nigel Hewitt]

Hello,
A friend send me this link on the web could some one let me know if that looks crediable as it goes pritty much against what i understood till now.Interesting.
30 meters for 30 minutes so into minimal deco on most tables.
I like the caveat about 'fit military divers'.

Thank you

[Taff Griffiths]

Interestingly they do not state what controls they employed, ie whether pre dive bloods were taken, a similar test with the same divers without the exercise was conducted or with a seperate control group of divers. :rolleyes:

I shall wait and see further restults before I will admit to the wife that I can exercise after diving. The DIY and gardening will just have wait a wee bit longer. :D

[Ben Panter]

I've got the full paper (perk of being an academic) but I'm afraid it's IP coded and I don't want the colleague who got it for me to get into trouble so I'm not going to send it on. In the meantime I'm happy to try to answer queries about it...

In terms of control sets, unless I've misread the paper it doesn't appear they had one. They had a interesting discussion about being supine or seated upright, apparently the seated position produced less bubbles. Whether it was actually bubble reducing or ability to see bubble impairing they don't really say.

The authors state quite firmly that the results are from a very small set of 7 navy divers, and shoudn't be extrapolated to make any recommendations to recreational sports divers without further study.

Ben

[Thalassamania]

So why? Is it that the exercise increases circulation and thus causes bubbles that exist to be filtered at the lungs and thus not detected?

Equally interesting, I thought was:

Exercise and nitric oxide prevent bubble formation: a novel approach to the prevention of decompression sickness? (http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=Abstract&list_uids=14724207&query_hl=1&itool=pubmed_docsum)

Here we can get high and then go down, and all in the interests of safety!<G>.

[jules59]

Thall...Noted your last comment. Dont get confused between the various oxides of nitrogen.

NO - nitric oxide - naturally occuring in the body with a multitude of properties which include blood flow distribution at a small vessel level. Hence the relavance to DCI in rats. Sometimes used in humans as an inhaled gas on intensive care units in miniscule quantities ie 10-20 parts per million. (higher doses can be lethal). So NO may take you alot higher than you anticipate - with a one way ticket.

N20 - nitrous oxide - analgesic / anaesthetic gas - "laughing gas"

NO2 - nitrogen dioxide - vehicle exhaust pollutant - forms nitric acid in water which dissolves human tissue rather well.

Jules