Question Freediving according to scubadiving

[CG43]

Hello

Thanks all , especially happy-diver for his honest words. I will do .

That is what you are doing? If so, that is extremely high risk for DCS. Bounce dives are about the worst thing you can do following a deco dive. Breathing or not is irrelevant as far as I understand, it's the pressure change that matters.

No , that's what I was doing before I knew the danger of this freedives after scuba .
But I did such freedives severall times every diving holidays .
I don't have any deco problemse noticed .
What worried me were the hard bumps and blows when we hit in the inflatabel in rough sea after scuba. But I noticed no problems there either.

 

[happy-diver]

Thank you so much I am extra happy-diver as you understand my words in the spirit of which they are intended

I have many wonderful diving memories and now one of them shall be yours

 

[BoltSnap]

Mate you're almost getting too old for scuba diving, keep your magnificent memories of freediving in your heart

Best answer


I would NOT combine free and scuba diving in any order but especially free after scuba. Snorkeling on surface is something else. One should also consider that doing extensive free diving before scuba is a strenuous activity that may have serious implications on scuba diving that comes later on the same day doing both.

 

[CG43]

Well ,now we know that the combination scuba and freediving the same day has DCS risk .
But is there anyone who has evidence ?

 

[BoltSnap]

You mean somebody who was bent doing it??? A "lab rat"?

 

[dmaziuk]

Well, there's evidence people get bent scuba diving and there's evidence (much fewer) people get bent freediving, so ... it is conceivable the the two would cancel each other out and nobody can ever get bent when freediving and scuba diving together.

Also, I know of this bridge in mint condition coming up for sale,

 

[Imla]

The evidence comes from bubblestudies. We KNOW there are micro/notsomicrobubbles in the blood when scuba. They may not be big enough to cause serious DCS with "Normal diving behaviour", the issue specifically with freediving after scuba is the shrinking of bubbles that then pass into the arteries and get carried into the especially sensitive areas of the body. The brain and the coronary vessels. Clogged arteries lead to ischemia. Ischemia in Brain and heart is a very different beast to battle than skin/fatbubbles.

If you are lucky @Duke Dive Medicine can bring some proper medical opinion on the matter.

 

[happy-diver]

Best answer

Well you know, in amongst my trolling, gobbledygook, and sensitivity issues, a gem has to surface sometimes

and dope smoking and drunkenness and general unacceptable behaviour

 

[CG43]

You mean somebody who was bent doing it??? A "lab rat"?

Yes sir , a lab rat for exable or a human .


As a young diver, I read everything I could find about deco. I didn't have a calculator or computer, but with the arithmetic stick I could recalculate table values myself. The tables were okay so far, but on the other hand I read that many North Sea oil divers got massive joint damage without ever having a DCS.

What I never liked were NDL dives.
I could not believe that at our ascent speed of 18m/min at that time the fast tissues were sufficiently decompressed.
I read from a diving doctor: The fast tissues should always be well decompressed, if necessary you can save some time with the slow tissues.
And so I basically always made stops 2 levels lower as the table provided and used that time to studied the table.
I have never felt decostress, although I had to climb, carry heavy , was literally beaten through in rough seas in the boat or made freedives . I know , I know............
What I suspect is that with a decent load with Mircobubbels that would have been bad for me.

BTW : You know the story with the rats?
It has been suggested that physical training on the day before diving increases sensitivity to DCS .
Surprisingly with rats exactly the opposite turned out. The coached rats were very resistant to DCS, the rested rats got DCS.

 

[CG43]

Well you know, in amongst my trolling, gobbledygook, and sensitivity issues, a gem has to surface sometimes

and dope smoking and drunkenness and general unacceptable behaviour

You make me happy.
Sometimes when I've read your posts I thought that I didn't understand English at all anymore.
Now I know why .
Keep up the good luck .

Rainer