I agree with what W Madison says. Seek medical attention and rule out the big stuff. After that, if it remains a mystery, you can investigate more mundane possibilities.
Such as....bonking. What you described sounds like what happens to me when I bonk. This hasn't happened in a long time, because I don't ride very hard anymore. But when I would bonk, my mind would go into bizzaro mode, and I would have to talk myself out of getting off of my bike wherever I was and taking a nap on the sidewalk. Eating/drinking something sweet and fatty would help (candy bar, chocolate milk, banana&pb&J). And then getting to my next healthy meal would straighten me out. Another possibility is an electrolyte imbalance. This can screw up nerve transmission (leading to cramps and confusion) and make you feel sick. make sure you are replacing your water and salts if you are pushing yourself. Also, on a more general note- in response to your line that you eat a no-fat diet, I suggest eating some good fats. Your brain tissue needs them! And, all of your cell membranes are made up of a mixture of greasy molecules which are being turned over all of the time. If you don't have enough fat to keep building cell membrane and the fatty coating that insulates the nerves (myelin), you will eventually wind up with neurological problems. Our nerve signals rely on myelin to insulate them and maintain signal fidelity. Steroid hormones (e.g. testosterone), which have a cholesterol backbone, also rely on your body's ability to manufacture cholesterol from constituent fatty-molecule building blocks. It's ok to limit your fat and sugar intake, but if don't eat any fat, you are robbing your body of its ability to make many of the building blocks that it needs. It can take years for problems to develop, but once they do, you want to make sure you are not making them worse. In good health. -India Viola PS- I am a graduate student in neurobiology at UW and have taken courses in biochemistry and endocrinology. I've spouted off the above info from the top of my head. I'm not an expert on humans or medicine, so of course take what I have said with a grain of salt. If you are interested, and I have time, I could try to find some reliable sources/references for the above info. On 09/30/10, W Madison <[email protected]> wrote: > There are a number of possible causes, of which true hypoglycemia is > one of the less likely. Despite a low-fat healthy diet, it is > possible to develop transient cardiac arrhythmias and the like. I > suggest a prompt visit to your personal MD and if that is not > satisfactory, a local cardiologist of which there are several good > groups in the area. The arrhythmia may be quite transient and a > cardiologist may want you to wear a monitor for several days in order > to detect such rare, transient events. Treatment can be quite > successful with return to activities. > > Another possibility is a cerebrovascular cause, which seems less > likely, but is another problem that should be taken care of promptly. > > I do not want to be alarmist, but I think you need to get medically > evaluated reasonably soon. It may take several investigations to find > the probable cause. > > Regards and best wishes. > > On Thu, Sep 30, 2010 at 4:28 PM, Eric Westhagen <[email protected]> > wrote: > > Dear Group, > > I have a bicycle racing medical question to anybody who might diagnose an > > explanation. I train for my annual Louis Reed 10 mile Time Trial--which few > > attend. My training is to simply ride as hard and as fast for the same > > sixteen miles near sunset when the wind is low. I ride as hard as possible > > commensurate with finishing. I am now 68. So, first out last Sring I was > > returning into Brandon when suddenly a big change happened in my head. But > > it was not a headache. I continued to my driveway and stood with my > > bicycle not wanting even to sit down. I was just slightly confused as I > > couldn't remember just how many miles I had ridden. And I was slightly > > nauseated. > > > > I did not go out again until I was on a more even diet--as I was dieting > > away those last "winter pounds" on the first ride. Well, a month later the > > same thing happened at the edge of Brandon. It was sudden and all in the > > head. It was not a headache but a complete change of "consciousness." I > > was not excessively breathless or anything like that. I walked the bike > > home. Soon it was July and race time and I had not trained. I went out in > > the mid-day and completed the sixteen miles without incident. But during > > the LR Time Trial, it happened on about the seventh mile and I immediately > > stopped for about four minutes while it passed and proceeded on at my > > earlier pace. There is no increase in blood pressure in these as I can > > determine later. > > > > My question is it some form of "hypoglycemia" with glucose depletion during > > racing? Why should this happen only now in my life? Has anybody else > > experienced this? I have no reason to expect TIA-type blood flow problems. > > For twenty years I have been on a no-fat, low sugar diet. > > If anybody has experienced--please let me know. I have largely given up the > > bicycle until I can figure this out since I live alone.------ew > > _______________________________________________ > > Bikies mailing list > > [email protected] > > http://lists.danenet.org/listinfo.cgi/bikies-danenet.org > > > > > > -- > W. Madison > _______________________________________________ > Bikies mailing list > [email protected] > http://lists.danenet.org/listinfo.cgi/bikies-danenet.org -- India Viola Stretton Lab 115 Zoology Research 1117 W. Johnson St. Madison, WI 53706 608.262.3336 "How can we learn from our mistakes if we don't first acknowledge them?" -Anonymous _______________________________________________ Bikies mailing list [email protected] http://lists.danenet.org/listinfo.cgi/bikies-danenet.org
