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Dangerous.?
- Thread starterspeedoglyn
- Start date
Thread Status: Hello
, There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.
It can take a long time to get an up-to-date response or contact with relevant users.
I dated an exercise physiologist a while back who was involved in some research on the response of the heart to breath hold. She said that there is a slightly delayed increase in blood pressure which reduces as the breathold continues (I believe it would reach zero if held long enough).
The purpose of the study was for sleep apnea sufferers, so basically people who do a mix of static and dynamic apnea all night every night. Eventually they develop chronic high blood pressure due to over activation of whichever nerve it is that causes the momentary rise in blood pressure during the apnea (I'm an engineer, not a doctor).
She said that she agreed that the cardio benefits of breath hold diving would most likely outweigh any negative effects on this nerve.
The purpose of the study was for sleep apnea sufferers, so basically people who do a mix of static and dynamic apnea all night every night. Eventually they develop chronic high blood pressure due to over activation of whichever nerve it is that causes the momentary rise in blood pressure during the apnea (I'm an engineer, not a doctor).
She said that she agreed that the cardio benefits of breath hold diving would most likely outweigh any negative effects on this nerve.
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Yes, the blood pressure stabilises. As you say, I would recommend breathing prior to blood pressure reaching zero.
My dry Aussie sense of humour requires that I don't follow my sarcastic remarks with winks or laughing faces, but being from the Mother Country I'm sure you can relate to that.
My dry Aussie sense of humour requires that I don't follow my sarcastic remarks with winks or laughing faces, but being from the Mother Country I'm sure you can relate to that.
Dunno what HBF is either, sounds like a cable channel.
I dont want to injure meself permanently, just like havin fun underwater etc! Also pretty cool to always win a breath-holding competition with my mates! Anyhow has anyone seen my new profile pics what d'you think one is pool meditation which I like cos the water in a swimming pool is WARM thats nicer maybe why i dont have a wetsuit only SPEEDOS LOOK AT MY USERNAME!! I realy like swimming first and foremost but would love to compete in freediving if I can practice first so anyone in UK please message me if your near.
I dont want to injure meself permanently, just like havin fun underwater etc! Also pretty cool to always win a breath-holding competition with my mates! Anyhow has anyone seen my new profile pics what d'you think one is pool meditation which I like cos the water in a swimming pool is WARM thats nicer maybe why i dont have a wetsuit only SPEEDOS LOOK AT MY USERNAME!! I realy like swimming first and foremost but would love to compete in freediving if I can practice first so anyone in UK please message me if your near.
Some people seem to think it's dangerous. On this page it's second only to BASE jumping in the top ten most dangerous sports! rofl
http://www.kidzworld.com/site/p1984.htm
http://www.kidzworld.com/site/p1984.htm
I grew up with a guy that eventually got into Base jumping when he was in his 20's. At the time of his death Dwain was regarded as the best in the world. They are certainly a different breed of people.
Give me blue waters over blue skies any day!
Give me blue waters over blue skies any day!
Don't know where this physiologist got this thing about falling BP from ?
I've seen graph's from people doing apnea (eg Dr Peter Lindholm's research), both static and under exercise. The Blood Pressure INCREASES as the heart rate decreases towards the end of the breathold. This won't happen for someone holding their breath for a few minutes, only happens once blood O2 is really dropping. For example in my case on a static O2 saturation doesn't fall below resting until at least 3.30 on say a 7 minute breathold. The real bradycardia (drop in heartrate) doesn't happen until the last 2-3 minutes. That's when you would likely see an increasing BP.
I would say perhaps there is a risk for someone unhealthy eg very high blood pressure, cardiovascular disease etc that doing long breatholds they could have a chance of a stroke or heart atack when their BP skyrockets at the end.
Ben, glad to know you finally got yourself some new budgy smugglers dude !
You know it's long overdue when parts of them become see thru. :naughty
Cheers,
Wal
I've seen graph's from people doing apnea (eg Dr Peter Lindholm's research), both static and under exercise. The Blood Pressure INCREASES as the heart rate decreases towards the end of the breathold. This won't happen for someone holding their breath for a few minutes, only happens once blood O2 is really dropping. For example in my case on a static O2 saturation doesn't fall below resting until at least 3.30 on say a 7 minute breathold. The real bradycardia (drop in heartrate) doesn't happen until the last 2-3 minutes. That's when you would likely see an increasing BP.
I would say perhaps there is a risk for someone unhealthy eg very high blood pressure, cardiovascular disease etc that doing long breatholds they could have a chance of a stroke or heart atack when their BP skyrockets at the end.
Ben, glad to know you finally got yourself some new budgy smugglers dude !
You know it's long overdue when parts of them become see thru. :naughty
Cheers,
Wal
