questions

[freedivernd]

Punky, that depends.. maybe what you mean is how long can a person do a breath hold on land vs. doing a breath hold while finning down and finning back up. The pro's are doing up to 8+ minute wet statics (in the water, but just floating) and now finning down and back from the depths in 3+ minutes and I would guess near maxed out at the end of both of those disciplines. Many experienced divers are doing much, much less than 8 minute statics and still hitting near the 3 minute dives. Everyone is different.
Myself.. I like to stay a long way away from my dryland static bests vs. my dive times. Say anywhere up to 50%. But unlike some, I have never surfaced thinking I was just about out of time...yet... but I have come away from dryland statics thinking one more second and I'll be out.
A good way to see what the difference for yourself is; sometime to do a resting (static) breath hold.. and then do a walking (dynamic) breath hold.. it may give you an indication of the difference.
Fred