Equalisation at 20-30m

[Sergii]

Hi
I have another question about Frenzel technique.
I started using Frenzel recently when I freedived with instructor. He saw my descend and told me that my Frenzel was right (belly was relaxed).
However, it was hard to equalise from 20 to 30 meters (my best). I felt like I was out of air, like my lungs were empty. I suspect that my technique isn't perfect. Can anyone advise me how to improve it.
Thanks.

 

[AhmadAbbas]

with you descent your lungs get smaller and smaller ... and the O2 compress more and more ..
so in some point you your lungs will be too compressed and you can't get the air from your belly..

so i'll give you one tip that will make your deep dives easier ...
Mouth-fill !!

and try to do some lungs stretching and some dry exercises to make your buddy ready for deeper dives and its pressure .

 

[azapa]

Sergii. A good Frenzel will only last to residual volume, without other tricks. Between 20 and 30m you are probably at RV. This depends on your lung volume, and other stuff like (to a lesser extent) your mask etc.

To go deeper you have two main choices:
a. learn to do a "mouthfill" before you hit RV: fill your cheeks with air like a gopher, and wiggle and squeeze that air into your ears past RV
b. Reverse pack air (pump or suck up) from your lungs to your ears. Often, the reverse pack is used to top up the mouthfil after RV.

The latter is what most spearos naturally do to go deeper than RV, but as many find (me) it only takes the solution a little deeper, say 40 to 50m.

I think the way forward is to learn the first technique (the mouthfil) directly.

A good buddy and instructor will be essential!

Dive safe.