Does anyone else suffer from oxygen debt after tumble turn?

This is not the least of my worries in swimming, but I tend to fall into oxygen debt after tumble turns. In fact, when I keep doing tumble turns in lap swims, it is less taxing to swim 50 LCM than 25 SCY, because I have more time in 50 LCM to recover from the oxygen debt, whereas in 25 SCY, I have to do another tumble turn and fall, yet again, into oxygen debt, before fully recovering from the previous bout. Do other master swimmers out there suffer from a similar problem? How do you over come this? I'm worse than you are. I do not do "tumble" or "flip" turns. After more than 45 years of heavy smoking (I quit back in 2002 just as I was becoming borderline emphysemic) I do not have the ability ON DRY LAND to take a full, deep and satisfying breat at will. It either happens or it doesn't (and I'm always happy when I feel the inhalation reach the bottom of my lungs every once in a while). When I do take a deep, full breath I find that my body -unconsciously- forcefully exhales it all out instead of letting it out slowly. This produces a problem for me in swimming turns. In regular swimming, even though I know how I should breathe, many are the times when I don't inhale enough to satisfy me. This means that I do not have enough air in my lungs to slowly exhale throughout the flip (even a quick flip) so as to keep water out of my nose. (Thankfully I do not compete in backstroke. I can swim it but I push off on my belly then twist.) Therefore I will do one of two things when I turn (in Freestyle). If I arrive at the wall on my extended or even semi-extended right arm, (I breathe to my left), I'll do the old-style back somersault (which if done at the right distance and at great speed is, IMHO, faster than the modern flip turns. But if I arrive on my left-arm then it's the open turn. I have debated whether the open turn is so much slower than my old-style back flip that, if I see that I will arrive to the wall on my wrong arm, should I skip a stroke (i.e., do a double one-arm stroke, almost like in drills) and arrive on my good arm, or the advantage gained by the flip (my flip) would be negated by the double one-arm stroke of my left-arm (while my right arm is extended, reaching for the wall). Now, I'm in oxygen debt from this explanation.

This is not the least of my worries in swimming, but I tend to fall into oxygen debt after tumble turns. In fact, when I keep doing tumble turns in lap swims, it is less taxing to swim 50 LCM than 25 SCY, because I have more time in 50 LCM to recover from the oxygen debt, whereas in 25 SCY, I have to do another tumble turn and fall, yet again, into oxygen debt, before fully recovering from the previous bout. Do other master swimmers out there suffer from a similar problem? How do you over come this? I'm worse than you are. I do not do "tumble" or "flip" turns. After more than 45 years of heavy smoking (I quit back in 2002 just as I was becoming borderline emphysemic) I do not have the ability ON DRY LAND to take a full, deep and satisfying breat at will. It either happens or it doesn't (and I'm always happy when I feel the inhalation reach the bottom of my lungs every once in a while). When I do take a deep, full breath I find that my body -unconsciously- forcefully exhales it all out instead of letting it out slowly. This produces a problem for me in swimming turns. In regular swimming, even though I know how I should breathe, many are the times when I don't inhale enough to satisfy me. This means that I do not have enough air in my lungs to slowly exhale throughout the flip (even a quick flip) so as to keep water out of my nose. (Thankfully I do not compete in backstroke. I can swim it but I push off on my belly then twist.) Therefore I will do one of two things when I turn (in Freestyle). If I arrive at the wall on my extended or even semi-extended right arm, (I breathe to my left), I'll do the old-style back somersault (which if done at the right distance and at great speed is, IMHO, faster than the modern flip turns. But if I arrive on my left-arm then it's the open turn. I have debated whether the open turn is so much slower than my old-style back flip that, if I see that I will arrive to the wall on my wrong arm, should I skip a stroke (i.e., do a double one-arm stroke, almost like in drills) and arrive on my good arm, or the advantage gained by the flip (my flip) would be negated by the double one-arm stroke of my left-arm (while my right arm is extended, reaching for the wall). Now, I'm in oxygen debt from this explanation.