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Is this a bonk or dehydration?(5 posts)

Is this a bonk or dehydration?empacher6seat
Aug 21, 2002 10:44 PM
So I was competing in my second triathlon, this one a sprint distance, and I was feeling like absolute s@#$ during run. I got light headed (slightly), felt chills, almost blacked out at one point I think.

I know I didn't hydrate properly before my race. I did have some to drink, but not nearly as much as I should have had. Also, I kind of skimped out on my breakfast. I had a big pasta dinner the night before, but my breakfast was very light (orange juice, a muffin, and a powerbar). This was partially due to pre-race jitters, and the fact that I got up late and had to travel a fair bit to the race site.

My bottle fell out of the T-zone as I was starting the bike and rolled under a bunch of bikes, so I didn't bother picking it up. It was a hot day (around 30*C), and I hit up the one water station on the run pretty bad. I took 4 cups, splashed them all over my face (I'm pretty sure some went in my mouth) then threw the cups and the guy holding the garbage bad a couple of meters away. The last kilometer of the run was pure agony. Running on sand, in heat, my mouth dry as a bone and barely telling where I was going... what was this? A bonk or just the results of really bad preperation? Or even just pushing myself too hard... that could be it, but it payed off... finished 8th overall and won my age category!
sounds like a heat strokecyclopathic
Aug 21, 2002 11:28 PM
if it's hot and you start having chills, headaches, dry mouth etc. 30C doesn't sound too hot, still if you got dehydrated (and it looks like from what you tell) it should do it.

You need to hydrate properly before and during, and don't forget electrolytes. Most sport stores have pills they're easy to carry and use.

I had similar experience doing a century on hot day (100F+ and 90% humidity); had plenty of water, ran out of electrolytes. When that happens and you don't have pills to replace them quickly stomach shuts off and it wouldn't matter how much you'd drink. The only thing you can do at that point is to spray water over face, head, neck and back, body loses most of heat through head and kidneys.

Be careful next time or you'd pay a visit to a ER fairy.
re: Is this a bonk or dehydration?Roadfrog
Aug 21, 2002 11:51 PM
Sounds like a serious case of heat exaustion. If you have these symptoms again... STOP! Try to find some shade and get some fluids in you. The race should not be that important when it comes to your health. Also, once your body has experienced this, it is more likely to show up again if you are not prepared. As the other poster just said... it could possibly lead to heat stroke. Good luck, Be safe! HOP
Heat exhaustion precedes a stroke which can be fatal. I wasPaul
Aug 22, 2002 3:03 AM
out riding (this has happen before) in 98+ deg. heat,and ran out of water 5 miles before a rest stop. I got chills and goose bumps which told me my body was shutting down due to lack of fluids. If you keep pushing, you could get a heat stroke, pass out, and could die. I made it to the rest stop, cooled down my body, and drank fluids. Once i felt okay (about 15 minutes), I pedaled slowly to finish the ride.

Be careful
Heat exhaustion precedes a stroke which can be fatal. I wasTerrapin
Aug 22, 2002 6:38 AM
I've had situations where I get nearly the same symptoms above, but without the goosebumps or chills, instead, I get Tunnel Vision, and my vision goes grey (no color). Is that also a symptom of heat stroke, or something more benign, like brain cancer? :D