VO2 max is a rate, rather than a storage volume (as I am sure Frank and Eric know).
I take it's meaning in Freediving to be:
The higher the VO2 max, the shorter surface intervals you can safely get away with.
I have a bit of a problem with all the predictor tests there are these days for it, since there is a large variability unless you measure it directly. I did a load of maximal tests about 6 years ago and got 3 measurements within the space of 2 weeks of: 64, 65 and 72.
I was fit then dammit!
I'm about 55-60 now.
