Life, Lung size and the urge to submerge .....
Dude,
So sorry you're stuck in Jhb ..... I moved to CT 2 1/2 years ago and never looked back.
I've measured my lung size according to what a buddy told me - I have NO idea how accurate it is. What I did was take a large (10litre + ) bottle and fill it with water. I then stuck a hosepipe in it and submerged it upside down in a pool so that there was no air in the bottle, only water and a bit of hosepipe.
Then, taking a FULL breath I blew into the hosepipe, which then displaced the water (or at least some of it) from the bottle. Once my lungs were empty, I put the cap back on the bottle (still under water and upside down, took it out and Voila! Measurable lung size (the air in the bottle should be the same as your lung size .... just fill it up with water from a jug)
As for wanting to stay under water for longer, it's still a little vague. If you want to do fairly shallow dives, say less than 5m, you'll do one type of training. If you wanna do deeper dives, say up to 20m, you'll do something different. And if you wanna go deeper, well, move to Cape Town and learn to dive in cold water.
Lemme know what you guys think.
Regards,
Riaan C
PS: Lung capacity +-7.5 litres .... he he he and I've been smoking for 4 years !