RoadBikeReview.com's Forum Archives - General


Archive Home >> General(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 )


Brain Freeze: Myth or Reality?(6 posts)

Brain Freeze: Myth or Reality?owmynads
Nov 23, 2003 3:59 PM
Went on my first "wintery" ride this am and no, I didn't freeze my 'nads off, as my nick might imply, but I came back a bit woozy, lightheaded. Later in the day, out of nowhere, I started getting really dizzy. Is this a "brain freeze"? Yes, I wore a helmet. No, I didn't throw anything over or under the helmet.

-owmynads
re: Keep your head warmhudsonite
Nov 23, 2003 4:30 PM
Never heard of Brain Freeze and it gets really cold around here. But I would suggest you keep your head warm. A headband at a minimum.

But it really depends on what you call cold? What they call cold in florida is going to be different than cold in Vermont, NH, MN or up here in the great white north.

My rule is below 20F, wear a hat if you are on a bike.

One thought on the dizziness; did you drink enough? In the cold we are less thirsty. I know I have to force myself to drink in the cold.
re: Keep your head warmowmynads
Nov 23, 2003 4:57 PM
Hmm... maybe that was it. I didn't drink as much as I normally do. Water, that is. ;-) But can it have effects such that you'd feel it hours later?

-ow.
In your case, mythKerry Irons
Nov 23, 2003 5:18 PM
It sounds to me like your blood sugar hit a low during the ride, and probably again later in the day. Could have been low blood pressure too. In order for your brain to freeze, you'd have to be dead! Your body protects your brain above all else. If you got hypothermia, your thinking would be clouded, etc. but you would have numerous other symptoms such as severe shivering. Plus, you wouldn't repeat the dizzyness later in the day.
re: Brain Freeze: Myth or Reality?lithiapark
Nov 23, 2003 6:26 PM
The brain is so well supplied by blood, 20% of the hearts output when you are at rest, that it is not possible to selectively cool the brain below core temperature more than an extremely small amount. Wearing something under a helmet is for comfort for the scalp and ears. You could also wear a helmet cover, there are some waterproof ones to keep out the rain as well. Or you could take some duct tape to an old helmet and cover up the vents for those rainy/snowy days:) There are several possibilities for your difficulties as others have suggested, but "brain feeze" is not amongst them in my opinion. To a large part this opinion is based on what needs to be done for hypothermic treatment of brain injury or for cooling during certain types of complex/long brain surgeries: the body core temperature is cooled by a variety of means to thereby cool the brain with cooled blood. You can't just put a "cooling helmet" on the head and achieve the same effect.
only when you're hydrating with slush puppie. nmdivve
Nov 24, 2003 12:08 AM