TMBRA - Rider Board

 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Heat exhaustion, lasting effects, continue performance?

 
Post new topic   Reply to topic    TMBRA - Rider Board Forum Index -> Ask the Bike Doc
View previous topic :: View next topic  
Author Message
The Toninator NLI
Guest





PostPosted: Fri Jun 04, 2004 9:59 am GMT +0000    Post subject: Heat exhaustion, lasting effects, continue performance? Reply with quote

During the 12 hour guts and glory race I felt I had hit the wall, a total bonk, on my 3rd lap directly in the heat of the day. Tunnel vision, dizziness, nausea, weakness and hot skin (although I did accidentally rub off my suntan lotion before this lap.) After the ride, and 1 more lap, I didn’t feel too bad but was wore out and tried to load up on the fluids to rehydrate. (I researched and it could have been heat exhaustion correct?)
During the week I felt rundown and week on my workouts. Consequently I cut my 4 workouts down to 3 of half and hour for one and 2 1 hour for the others at a zone 1-2. Sleep was restless and woke up groggy and lacking energy (for the whole days.)
I went to broken oak did a preride and couldn’t keep an easy pace so I decided to not race and rest a few days, completely off the bike. Slept all day Monday.
Since Tuesday I’ve done low intensity workouts 3x 1 hour zone 1-2. Although I feel better than last week I just don’t feel a 100%.
I’m trying to make the decision on whether to ride the race tomorrow. Opinion?
Back to top
The Bike Doc
250+


Joined: 08 May 2003
Posts: 1398
Location: Corpus Christi and Warda, Texas

PostPosted: Fri Jun 04, 2004 10:13 am GMT +0000    Post subject: Re: Heat exhaustion, lasting effects, continue performance? Reply with quote

The Toninator NLI wrote:
Opinion?


Clinton inhaled!
Bush snorted!
Hillary remembered!
Regan knew!

Opinions, I got lots of 'em....

Now about your dehydration...

It can take several weeks for the body to recover from dehydration. Though the intravascular volume (the fluid within the blood vessels) can be rapidly replaced during the first 24 hours, it takes several weeks for the depleted volume in the extravascular space within the cells and the area around the cells to be re-established. That translates into decreased performance and increased suceptibility to heat stress injury.

Should you ride the 12 Hours of Dirt? With your recent dehydration and your persisting dimished performance, your body probably has not recovered from the heat exhaustion you incurred. Lay low for the next few weeks. Come out to the 12 hrs of Dirt to support your friends.

Thanks,
_________________
Paul K. Nolan, MD
AKA: The Bike Doc
Back to top
View user's profile Send private message Visit poster's website
the toninator
250+


Joined: 01 May 2003
Posts: 1706
Location: Hights

PostPosted: Fri Jun 04, 2004 10:18 am GMT +0000    Post subject: Reply with quote

thanks doc.

how do you feel about soy futures?
Back to top
View user's profile Send private message
Anonymous
Guest





PostPosted: Fri Jun 04, 2004 10:20 am GMT +0000    Post subject: Reply with quote

the toninator wrote:
thanks doc.

how do you feel about soy futures?


You didn't ask me, but I think they perpetuate camping issues.

Good question. I have been wondering some of the same things you asked about too.
Back to top
racer99
100+


Joined: 25 Oct 2003
Posts: 122
Location: South

PostPosted: Fri Jun 04, 2004 8:07 pm GMT +0000    Post subject: Reply with quote

T, once again you put together an excuse with an alibi.
Back to top
View user's profile Send private message
Anonymous
Guest





PostPosted: Fri Jun 11, 2004 7:36 am GMT +0000    Post subject: Reply with quote

Are heat exhaustion and stroke directly related to dehydration?
Back to top
Anonymous
Guest





PostPosted: Fri Jun 11, 2004 7:53 am GMT +0000    Post subject: Reply with quote

Heat Stroke is often the (terrible) end result of Heat Cramps that went to Heat Exhaustion that goes to Heat Stroke...

Yuck
Back to top
Anonymous
Guest





PostPosted: Fri Jun 11, 2004 9:47 am GMT +0000    Post subject: Reply with quote

So are they caused by dehydration or salt depletion or both?
Back to top
The Bike Doc
250+


Joined: 08 May 2003
Posts: 1398
Location: Corpus Christi and Warda, Texas

PostPosted: Fri Jun 11, 2004 9:52 am GMT +0000    Post subject: Reply with quote

There is both salt as well as fluid loss in heat exhaustion and heat stroke. Sometimes when just water is taken in but nothing with electrolytes or salt, serious complications of hyponatremia (low sodium) and hypokalemia (low potassium) can occur even though the fluid volume is addequate. These complications can be severe muscle weakness, abdominal cramps, vomiting, mental confussion, seizures and/or death from severe brain swelling.

Thanks,
_________________
Paul K. Nolan, MD
AKA: The Bike Doc
Back to top
View user's profile Send private message Visit poster's website
Guest






PostPosted: Fri Jun 11, 2004 10:35 pm GMT +0000    Post subject: Reply with quote

Maybe someone else asked this question before...if they did I have not read it. Here it is, I heard from several sources that once you suffer heat stroke it becomes easier to suffer heat stroke again. How does the body change that this happens?
Back to top
The Bike Doc
250+


Joined: 08 May 2003
Posts: 1398
Location: Corpus Christi and Warda, Texas

PostPosted: Sat Jun 12, 2004 11:07 am GMT +0000    Post subject: Reply with quote

A person is more susceptible to heat injury for several weeks after heat stroke or heat exhaustion due to the severe dehydration that occurs not only to the fluid volume in the blood vessels but also in fluid in the tissue within the cells and the spaces around the cells. Though the intravascular blood volume can be rapidly replaced, it takes much longer to replenish the extravascular fluid space.

Additionally, some individuals are more prone to heat stress injury due to the physiologic make up. Some individuals are more efficient at sweating and can cool their bodies more effectively (provided ample and appropriate fluid intake is consumed) and others are less efficient at cooling thier bodies. Those less effecient cooling individuals will always be more prone to heat stress injury. With training and conditioning, the sweat output of the body can be increased, which helps improve the efficiency of cooling. With the higher sweat output that comes with training, the fluid intake and electrolyte intake must also be increased to maintain sweating/cooling effeciency. However, even the most effective body at cooling itself can be overcome by excess heat and humidity.

Thanks,
_________________
Paul K. Nolan, MD
AKA: The Bike Doc
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    TMBRA - Rider Board Forum Index -> Ask the Bike Doc All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group