Early Fuzziness in no warm up frc dives

[azapa]

I have been training DNF in general and start the session of with a few no warm up dives. No lead or suit. Just mask and speedos therefore most swims are about 30% lung.

3 mins shallow breathing at pool edge, get in and go. At about 50% of my PB I start getting "fuzzy". On one swim I even changed lanes. But on exiting, I am completely fine, not even a slight samba (which I can swim to easily while training).

Basically, No warm up FRC I have a long fuzzy period and easy recovery, versus on a warm up dive a short fuzzy period and tough recovery. Make sense?

 

[Simos]

Are the warmup dives also FRC 30% azapa?
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[azapa]

Yes Simos. all the session is about 1 1/2 hour long:
- Starts with one 30% lung no-warm semi-max. Followed by another two attempts. Each gets harder (for me).
- Then 20 full exhale 25m dnf's with 30 second recovery
- Then a little technique
- Then about 10% lung progressively longer static + DNF (finishing at about 2:00 total dive)

 

[efattah]

This is similar to my experience. I mentioned in another thread that on FRC ascents, my vision could be 'gone' at 40m (couldn't see anything due to hypoxia, I assume), yet I would still make it clean on the surface. On inhale dives, fading vision at 10m meant a blackout at the surface. On inhale dives, fading vision at 40m would probably mean a deep blackout.

I have some vague theories as to what might be going on, but little evidence to support them.

 

[Kars]

Well a fuzzy mind might mean that it's rational part is fading?

Actually when I dive I try to avoid using any rational thoughts, accept an occasional position and body status check every now and then.

Btw, since a few years I learned to close my eyes when freediving. It saves a lot of energy and it helps getting into the flow and feelings.