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hmmmm..Just One Energy Drink Reduces Endothelial Function; good idea for endurance activity?
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https://www.medscape.com/...nergydrink&faf=1

"We found an approximately 50% reduction in the arteries' ability to dilate," Higgens said. "Our subjects weren't doing any physical activity, but many people consume energy drinks before they exercise and during exercise, and it is critical that arteries dilate properly to deliver the increased demands of oxygen to the brain, heart, and muscles."
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Re: hmmmm..Just One Energy Drink Reduces Endothelial Function; good idea for endurance activity? [ggeiger] [ In reply to ]
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ggeiger wrote:
https://www.medscape.com/viewarticle/904972?src=soc_fb_181216_mscpedt_news_mdscp_energydrink&faf=1


"We found an approximately 50% reduction in the arteries' ability to dilate," Higgens said. "Our subjects weren't doing any physical activity, but many people consume energy drinks before they exercise and during exercise, and it is critical that arteries dilate properly to deliver the increased demands of oxygen to the brain, heart, and muscles."

interesting. but i have complaints. first, i'd like to see "energy" drink defined. it's clear that it's monster and, i suspect, red bull he's talking about. nevertheless, for those who don't look too closely, might they throw fluid replacement into that?

second, the author says, "These drinks are becoming more and more popular, especially with young people. We need to determine what if any amount is safe and how this may differ in different groups. The marketing of these drinks to young people has to stop. The message should be spread that they can be especially harmful before strenuous exercise. Sales of energy drinks to children should be prohibited, and the label should clearly state the possible adverse effects and the groups at higher risk."

i would prefer it if authors of medical studies don't make such sweeping and strident policy prescriptions based on a single study of 44 college students. the statement undermines the credibility of the study.

i've never had a red bull. or a monster energy. or anything in that category. i suspect the author's instincts are right. but when you throw down hard, politically, after your study is published, that makes me wonder whether your study's result was a foregone conclusion.

Dan Empfield
aka Slowman
Last edited by: Slowman: Dec 16, 18 8:56
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Re: hmmmm..Just One Energy Drink Reduces Endothelial Function; good idea for endurance activity? [Slowman] [ In reply to ]
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Slowman wrote:
ggeiger wrote:
https://www.medscape.com/viewarticle/904972?src=soc_fb_181216_mscpedt_news_mdscp_energydrink&faf=1


"We found an approximately 50% reduction in the arteries' ability to dilate," Higgens said. "Our subjects weren't doing any physical activity, but many people consume energy drinks before they exercise and during exercise, and it is critical that arteries dilate properly to deliver the increased demands of oxygen to the brain, heart, and muscles."


interesting. but i have complaints. first, i'd like to see "energy" drink defined. it's clear that it's monster and, i suspect, red bull he's talking about. nevertheless, for those who don't look too closely, might they throw fluid replacement into that?

second, the author says, "These drinks are becoming more and more popular, especially with young people. We need to determine what if any amount is safe and how this may differ in different groups. The marketing of these drinks to young people has to stop. The message should be spread that they can be especially harmful before strenuous exercise. Sales of energy drinks to children should be prohibited, and the label should clearly state the possible adverse effects and the groups at higher risk."


i would prefer it if authors of medical studies don't make such sweeping and strident policy prescriptions based on a single study of 44 college students. the statement undermines the credibility of the study.

i've never had a red bull. or a monster energy. or anything in that category. i suspect the author's instincts are right. but when you throw down hard, politically, after your study is published, that makes me wonder whether your study's result was a foregone conclusion.

X1000

-------------
Ed O'Malley
www.VeloVetta.com
Founder of VeloVetta Cycling Shoes
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Re: hmmmm..Just One Energy Drink Reduces Endothelial Function; good idea for endurance activity? [ggeiger] [ In reply to ]
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Medscape is garbage for not linking am abstract.

This is the closest I could find m.newsroom.heart.org/news/energy-drinks-linked-to-more-heart-blood-pressure-changes-than-caffeinated-drinks-alone
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Re: hmmmm..Just One Energy Drink Reduces Endothelial Function; good idea for endurance activity? [Karl.n] [ In reply to ]
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Karl.n wrote:
Medscape is garbage for not linking am abstract.

This is the closest I could find m.newsroom.heart.org/news/energy-drinks-linked-to-more-heart-blood-pressure-changes-than-caffeinated-drinks-alone



try this one
https://newsroom.heart.org/...lood-vessel-function

When I was in cardiology fellowship, over 20 years ago, I was in the 'normal control arm' for lots of brachial artery studies looking at endothelial function with Dr.s Corretti/Plotnick/Vogel.


Now, I'd probably be in the CAD risk group-HA!
https://www.ncbi.nlm.nih.gov/pubmed/7586766

These studies are often small, end up on a poster and are used as darts to throw at whatever they want to attack. Sweeping statements are headline grabbers and often inappropriate.
Last edited by: dtoce: Dec 16, 18 8:36
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Re: hmmmm..Just One Energy Drink Reduces Endothelial Function; good idea for endurance activity? [dtoce] [ In reply to ]
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Sorry if I missed a point, but if I recall correctly stimulating the sympathetic system causes a mix of vasoconstriction (brain, digestive tract, skin, kidneys) while vasodilating key areas (parts of brain, big muscles, lungs heart) right? Like caffeine can reduce cerebral flow by a quarter, so you could say it reduces brain blood flow which sounds scarey and counterintuitive, but overall brain function improves for fight or flight because key areas are supplied at higher pressure because of it.

Wouldn't we respond the same to energy drinks?

These subjects were resting right? Would the results be different if the test subjects were exercising?

Did they measure the response over time? Is there initially vasoconstriction so the person can go into explosive anaerobic fight or flight initially, but then followed by vasodilation around the heart and lungs if the reaction is sustained and the body is forced to go into less explosive fight or flight?
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Re: hmmmm..Just One Energy Drink Reduces Endothelial Function; good idea for endurance activity? [lacticturkey] [ In reply to ]
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Interestingly this article says that caffeine causes endothelial vasodilation
link
Last edited by: lacticturkey: Dec 16, 18 10:42
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Re: hmmmm..Just One Energy Drink Reduces Endothelial Function; good idea for endurance activity? [lacticturkey] [ In reply to ]
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Just have to take a viagra with your red bull.
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