Exercise in the AM dive in the evening?

[DWJ]

Around 7am I go out for a 25 min run before work. Tomorrow I’m doing a 60’ dive on a wreak using EAN32 . Boat leaves the doc at 5pm, in the water by 6pm. .
Is the 10 to 11 hour span here significant enough to mitigate any additional DCS risk?

Thoughts????

Dave

 

[CameronMartz]

Around 7am I go out for a 25 min run before work. Tomorrow I’m doing a 60’ dive on a wreak using EAN32 . Boat leaves the doc at 5pm, in the water by 6pm. .
Is the 10 to 11 hour span here significant enough to mitigate any additional DCS risk?

Thoughts????

Dave

Dave,

Sorry I missed this post for so long- you might also want to move it (or have it moved) to the Dr. Deco section, as he is NASA's expert in this regard.

Exercise *before* diving does not seem to pose the same types of risks as exercise *after* diving. Dr. Deco himself has been involved in much of the research done on pre-deco exercise for subjects being decompressed to altitude, and he has concluded from his altitude research that 4 hours should be enough time between exercise and dives performed with NDLs. This is thus what DAN recommends. http://diversalertnetwork.org/medical/faq/faq.asp?faqid=133

That said, exercise-induced bubbles experience very different influences when being compressed at depth before decompression versus being taken to straight to altitude, and research is only beginning to look at this. Recent research on rats found that cardiovascular exercise 30 minutes before a simulated dive had no measurable impact on DCS risk.
http://www.ncbi.nlm.nih.gov/entrez/...d&dopt=Abstract&list_uids=14724207&query_hl=1

I dedicate an entire chapter to this topic in "Fitness for Divers," but long story short, 10 hours is plenty of time between your run and your dive, if it were to have any influence at all.

Cameron