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Mostly it won't. Whenever you switch fins (even to superior ones), your performance will suffer and it will take weeks before you adjust your finning to really use the advantage of the fins. And even then, the difference will be quite negligible.
Each fin requires different kicking style, but in dynamic apnea it does not necessarily make monofin superior to bi-fins, or carbon superior to plastic. Current DYF world records were set with bi-fins, and there are many freedivers preferring bi-fins for dynamics. And I know there are many freedivers that will pull practically the same length with plastic, fiberglass, or carbon fins (and yes, me too). On my mind, the fin upgrade won't make more difference than some 1%-2%, and that only assuming you adopted your kicking style perfectly to the new fin.
That's also not necessarily true. Many DYF and DNF records and PB's were set in 25m pools. Especially at slow DYF simmers, and in DNF the turn can be an advantage.
This is the biggest nonsense I ever heard. Your performance will most likely not change at all after swapping fins. The difference between DYF and DNF discipline (with and without fins) is at records and at most PB's around 20%, often even much less. So there is no way you could get 40% boost with just changing fins. People tend to believe that an expensive carbon fin will make miracles for them, but it is not at all true. Yes, many freedivers improve after upgrading fins, but that's not because of the fins; it is because they usually get the new fin in the phase when they start to be more serious about freediving, but still have miserable technique and endurance, and would improve anyway even without swapping the fins. You better invest into good training / coach / course than expensive fins - that will bring much more difference.
Yes, monofin is powerful and fast, but that's about all. In DYF, many top freedivers prefer slow swimming, and then the monofin is absolutely inefficient. The world records, national records, and PB's are pretty close for both categories of fins (recently bi-fins win). Difference of 100% is a complete BS.
Thanks for asking. Not too bad lately. Yes, monofin is more efficient for fast swimming (it means for speed records) or for lifting your weight from depth (CWT), but that's not what is important at dynamic apnea. As you can see in statistics, bi-fins may be more efficient than monofins, especially when swimming slow. That's because the water resistance grows with square of your speed, so the slower you swim the (considerably) less resistance you have to fight and the less oxygen you spend per meter. And because with a monofin it is simply quite difficult to swim slow and with a clean efficient style, unlike at aerobic fin speed swimming, the fin efficiency is eliminated by the disporportionally higher consumption of oxygen. Well, there are some monofinners capable to swim with a clean style rather slow (i.e. Molchanova), but still with bi-fins you'll manage swimming with much less effort, so if you have good static times, you better rely on the slow bi-fins motion than on the fast efficient monofin.Tell us how you really feel trux
I thought monofin was more efficient? I guess not.
That comes from personal experience, observation of others, and comparing results of diverse competitors I know. There is absolutely no way you could gain 40% with changing your fins to carbons and 100% to monofin. Since the performance with fins is usually around 20% above the distance without fins, it would mean that with your old plastic fins you can make only 80% of your no-fins performance, which is of course nonsense. Even with the worst scuba or snorkeling fins you will mostly do a bigger distance than in DNF (well, I believe there may be some exceptions, but probably rather rare).
I see from where you come. Have you read what I wrote? Did you see that many records were set in 25m pools? Do you realize that when you have a good turn technique you can turn the turn into an advantage? Yes, there is a change of direction and loss of kinetic energy, but again there are way how to minimize it, and especially at the push you can gain more energy than losing and that using other muscle groups (still saturated with O2 and energy) than the ones used for kicking. So yes, you are right, if you do not have a good technique, or are a super fast swimmer, it may be a disadvantage, but that's apparently not the case at all freedivers.
