I have a question about the Mammalian Dive Reflex.
When we dive in cold waters, my ( ours ) bodies physiological response is to enter bradycardia, my heart rate drops to 40-50 BPM, blood rushes to my vital organs, and blood rushes away from our extremities. This is so that our bodies conserve oxygen while diving.
Anyways, Ive been toying with the idea of the mammalian dive reflex for a while, and i do different breathing excercies ive picked up from Wim Hof over the years. I love the breathing excercies because i use them a lot for swimming ( part of my training regime for MMA fighting ) and i thought that the breathing excercies would help me with my diving. Anyways, When my body enters a state described by the mammalian drive reflex, i am having a hard time controlling and even distinguishing the PSYCHOLOGICAL response from the physiological response. What i am about to ask is only for training and safety purposes, but any other explanations or tips and sources of information regarding the mammalian dive reflex will be greatly appreciated. When i hold my breath for a long time and my body wants oxygen, it will do these little thing i like to describe as "hiccups". Im not too sure it goes away, but i have managed to stay underwater AFTER i started getting the "hiccups" for one minute and forty five seconds. I could be one hundred perfect wrong, but is the "hiccup" just how my body reacts to me entering bradycardia? Is that the response that my body has to a low heart rate? |
Re: I have a question about the Mammalian Dive Reflex.
Your hick ups, are diaphragm contractions almost everyone gets them after around a minute or two, after they start you just have to power through them
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Thanks for that information by the way. |
Re: I have a question about the Mammalian Dive Reflex.
Hold it until you pass out (out of water ) but that's not really your limit ,it will change depending on conditions and what you are doing at the time .
In static conditions I can hold mine 4 or 5 minutes after contractions start |
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Re: I have a question about the Mammalian Dive Reflex.
Op: buy a pulse oxy meter and begin experimenting with that. There are actually different 'types' of contractions and triggers, you can learn the difference. Typically bradycardia and vasoconstriction starts as you begin to experience contractions.
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Re: I have a question about the Mammalian Dive Reflex.
I've heard that blacking out once while diving can lead to an increased chance of blacking out again at some point. What do you guys think? And is the same true if you do it on land?
Like the others said, statically holding your breath on land is much different than when in the water. Sometime's I'll kick my legs or move like I'm diving when I'm laying in bed practicing "statics." Kind of reenact those movements I make in the water. Hiccups when I'm spearing don't occur very often since I don't let myself stay down very long unless absolutely necessary to get at a fish so I'm usually up before the first few P.S. you'll know that the reflex has started to really kick in when you're peeing in your wetsuit every 5 minutes or so. |
Re: I have a question about the Mammalian Dive Reflex.
Some sambas in a controlled environment may happen for competive freedivers in training but anytime a diver has a full BO it usually a symptom of overtraining and if the diver continues at the same pace, BO could be more frequent.
And some divers have physiology that makes them prone to BO but the first BO isn't causing future ones, they're just prone to BO. But a one time hypoxic BO is not going to make you susceptible to future ones, at least not after you have rested. In the same day of diving you are certainly more susceptible though because of other factors--if you dive in the ocean hard enough to BO, you typically have gone way over your lactic threshold on at least that one dive, may have been diving all day and have gone into ketosis, are likely more mentally stressed, etc, all factors which will increase your body's O2 consumption; the size of your gas tank is shrinking. If you have a BO while spearing you need to call it a day. Sent from my SM-G930T using Tapatalk |
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That's very interesting. I've never heard that there is an increased chance, but it does make sense to a certain extent. That certain extent being psychological. |
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Re: I have a question about the Mammalian Dive Reflex.
the hydrostatic pressure confuses the kidneys and triggers peeing.
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