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 

Recent Boinking Incidents

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

PostPosted: Mon Sep 18, 2006 2:19 pm GMT +0000    Post subject: Recent Boinking Incidents Reply with quote

I am a 43 year old, 205 lb. beginner class racer. Earlier this year, I had a major injury that put me off the bike for 4 months. So I am not in the best shape, but I can do a 10 mile, 10 mph avg trial ride at Memorial Park with no problem.

During the past month, I have had two major boinking incidents while riding at Rocky at a fast pace. Both were only 5 miles in. In both cases, I felt light headed, (just stupid) out of breath and had major cramps/muscle burn. Yesterday was horrible and I had to stop. It was hard to get a breath. After the first incident in late June, I saw my doctor two days afterward for an unrelated condition and he ran a blood test. The test indicated that my metabolites were extremly low, his comments were "looks like you almost had a heat stroke". Both occured during hot afternoon rides when the temperature greater 95 deg F. I was sweating more than a dog. The next day I felt fine with no soreness.

I always hydrate big time, starting early in the morning and follow up with gel energy pack before I start to ride. I am a huge sweater and drink at least 1 liter of water per hour.

Does it look like I am just out of shape or is there any advice you can provide. I am planning to ride this weekend at RH. Also, what are your recommendations for a pre race meal and do you recommend any of the energy packs before or during a race. I would be interested in trying to minimze muscle burn and fatigue. Note, I will be scheduling a physical soon.

Thank you,

Back to top
The Bike Doc

Joined: 08 May 2003
Posts: 1371
Location: Corpus Christi and Warda, Texas

PostPosted: Mon Sep 18, 2006 9:29 pm GMT +0000    Post subject: Reply with quote


Translating your doctors med-speak I suspect you were low on electorlytes including sodium, potasium and chloride. This is likely due to your choice of fluid replacement. Plain water has none of these electrolytes and if that is what you use to replace your sweat which contains sodium, potasium and chloride, then the blood levels of these electorlytes will gradually fall. Symptoms of low sodium and potassium include weakness in the muscles, light headedness, nausea and muscle cramps. Try switching to an electrolyte containing sport drink such as Gatorade (TM). This will help keep your electrolytes while replacing the water you loose in your sweat. Increase you fluid intake to match what you sweat out. Most men sweat 1-2 quarts per hour so you may be under shooting your sweat looses. Weigh yourself immediately before and after a hard ride. For every pound you are down in weight you need to increase your fluid intake by 16 ounces. As an example, if you drank a quart during an hour ride and your weight is down a pound, you need to increase your hourly intake to 1 1/2 quarts per hour. Finally, use the 10 percent rule. Increase your milage and intensity no more than 10% each week to allow your body to adjust to the rigors of your exercise and bike training rides.

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

PostPosted: Tue Sep 19, 2006 12:17 pm GMT +0000    Post subject: Reply with quote

...what DOC said for sure, but also remember that not everyone can tolerate heat the same way. Some do better then others when it comes to heat, plus add the humidity factor to that. I have been, on purpose, doing some of my run training late afternoons when it's the hottest outside to get ready for Xterra Worlds in Hawaii next month. I want my body to be used to the race conditions out there as much as possible. I found that it is very difficult to keep my heart rate really low in HOT and Humid conditions even though I am not running hard. Your situation may have been a combination of things including dehydration, too high HR level (even though you may have not pushed hard at all), humidity and maybe a predisposition to not doing so well when it's hot outside.

One last thing to consider, if you are using a Camelbak, check the, bladder, hose and mouth piece to make sure it's not moldy. That's what happended to me once when my hose was moldy and I got really sick about 30 minutes into the ride. Not really sure why, but I was blaming the mold for me getting sick Very Happy
Back to top

Joined: 15 Sep 2003
Posts: 113

PostPosted: Tue Sep 19, 2006 12:28 pm GMT +0000    Post subject: Reply with quote

....bonking, not boinking. Those occasional Viagra ads that appear and disappear on the forum are for boinking problems Wink
"They guy send your PayDirt forms to"

* Submit a completed form with approved land manager's signature to Series record keeper postmarked no later than May 1, 2012.
Back to top
View user's profile Send private message
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