Hey Soki,
Those two minutes I'm achieving only after at least 10 days of every day spearfishing. And when I am saying "dynamic", there's a little something else to it. Here's my way of diving, which explains a lot:
- Surface to bottom (12 -15m) - some 30" - takes a lot of time cause I don't usually move my legs after the 3rd meter. After that i let myself falling to the ambush spot...
- Ambush - 1'10'' - 1'15'' - during that time I won't call my apnea a dynamic one - I'm just moving my head.
- Back to the surface - 15"-20" - I hate surfacing too fast, and it also gives me opportunity to check the landscape better and pick the next ambush spot...
So my dynamic is not a pure one... And I do those apnea times only when I am spearfishing for fun or training. At the end of the season my bottom time gets even higher, but once again - there's no point to break records while spearfishing. When you're on a competition, you have to distribute your energy very well cause the duration of the competition day is usually 5 hours. And if you do apnea times of some 2' on every dive, you'll get too tired after 45 minutes in the water... What are you going to do after that?
So, for me it's all about distributing your energy the most efficient way possible and not breaking personal bests. The development of your skills will come naturally.
Ivan