Blackcrusader
Contributor
This looks like a dazzling RMV of about 0.26-0.27 cu ft/min or 7.4-7.6 ltr/min
Pretty close....
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This looks like a dazzling RMV of about 0.26-0.27 cu ft/min or 7.4-7.6 ltr/min
This looks like a dazzling RMV of about 0.26-0.27 cu ft/min or 7.4-7.6 ltr/min
I think it's a SAC of around 8.5 minutes...
I assumed a 93 min dive, an avg depth of 14.2 m or 47 ft, gas consumed 210-50 bar or 3046-725 psi, and a standard AL80 (77.4).
If your SAC was 8.5 psi/ min, that would be a RMV OF O.22 cu ft/min or 6.2 ltr/min. Now, that would be really low. This also assumes an AL80
Maybe I made some incorrect assumptions
Pretty close...
So...your original example had a low RMV of 7.86 ltr/min or 0.28 cu ft/min.
My confusion arose when you said you thought your SAC was 8.5. I use SAC as a measurement of pressure over time, psi/min or bar/min. This is cylinder dependent. I use RMV as a measurement of volume over time, cu ft/min or ltr/min. This is cylinder independent.
This topic has been discussed many times on SB. The two terms are used interchangeably by many discussants and in dive download software. This leads to the confusion often seen in discussions. In my example, in post #52, my download app lists both SAC (psi/min) and RMV (cu ft/min). In your example, post #53, your app lists SAC, which I would call RMV, in l/min.
Your best dive, with a RMV of 7.18 l/min or 0.25 cu ft/min, demonstrates impressively low gas consumption
So...Your best dive, with a RMV of 7.18 l/min or 0.25 cu ft/min, demonstrates impressively low gas consumption
I don't know about hypercapnia. I mean, I do know that it happens, but I never felt any symptoms, though as a diver I am rather reckless. I suppose, though CO2 chemistry is somewhat complicated, most excessive CO2 is blown away during safety stop, same way as N2. Also, people probably can adjust to hypercapnia. I know folks who trained themselves to do shallow breathing, for example.
As for the aerobics, like I said previously, by running marathons you train yourself to consume more O2, not less. So no relation with SAC here.
This seems opposite of what I've always read - which was that you should practice diaphragmatic breathing?So, with that said, ideally to start with lay on your back on a hard surface and place a hand over you abdomen (i.e. ‘belly button’), as you want to make sure you are expanding your chest (i.e. lungs), not simply filling your abdomen with air. So, if your doing it right - no pun intended! - your abdomen should stay ‘flat’ (i.e. your hand does not move up and down) while you upper body ‘expands’ so to speak. (Note; if your abdomen is rising, your ‘doing it wrong’!)
This seems opposite of what I've always read - which was that you should practice diaphragmatic breathing?
https://www.psychology.uga.edu/sites/default/files/CVs/Clinic_Diaphragmatic_Breathing.pdf
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