quote:<HR>Originally posted by kaitlingarrett:
Gee you treat me like I am some kind of monster. The only reason I am thinking about not doing the marathon is for the health of my baby. It's not like I am just starting to run. I have been a runner for several years and ran most of the way through three very healthy pregnancies! I am also a nurse. The marathon is in late october in Michigan, I don't expect the temperature to be a stressor. Electrolytes and blood sugars are easily regulated with pleanty of water, sports drinks and knowing when to back off. <HR>
kaitlin
Sorry if I came across a little harsh. I certainly don't think you are some kind of monster, but I am
very familiar with the way signing up for a marathon can make people not know when to back off and when to quit.
For all those who think that all will be good and you can just use your heart rate monitor or think electrolytes and blood sugar are easily regulated with plenty of water, sports drinks and knowing when to back off, how many marathons have you all run????

NOT that easy! In one test group, 30% of people who finished Boston - experienced runners who thought they knew exactly how to regulate everything - still had low blood sodium. Not only is it not that easy to regulate your fluid intake and glucose and electrolytes and hydration, for sure it is NOT that easy to know when to back off once you are in the race. For instance, would you really be able to drop out at mile 24 or mile 25 if you were overheating or having some problems, or would you convince yourself you were OK for just 1-2 more miles to complete your first marathon? Remember, your own body temperature is likely to rise from the exertion, regardless of how hot it happens to be in Michigan; you don't need to have a warm day to have your body temperature rise when you run. Also, if you decide to run your marathon in late October, would you still be intending to continue with your long runs now while it
is still hot? Any runs over 3 hours are a problem in themselves with glycogen depletion in addition to the temperature, electrolyte and hydration issues - it's not just the marathon; it's the long runs during training that could be a problem for you and you unborn child.
Even if you could hydrate perfectly, keep your core temp OK, keep your blood glucose levels up, (and I very much doubt all 3 are possible when running a marathon) could you keep your body from producing extra cortisol when your glycogen levels get low? That's actually the thing that I have seen a lot more information on lately that could be even more concern, not for immediate obvious birth defects, but for the long term well-being of your child into adulthood and beyond. I was a steroid chemist for 7 years before refocusing on molecular biology, but I still follow some of the endocrinology research and there has been quite a bit lately about the negative impact on increased cortisol levels during pregnancy having longterm effects on your child in addition the effects of increased cortisol from long runs on your own immune system.
Anyway, good luck to both you and your child and if you do decide to run the marathon regardless of the risk, consider carrying a cell phone and make sure you have some plans to be able to be picked up on the course if you do decide you want to drop out. I don't know anything about the Michigan marathon, but I do know of several people (3 different marathons) who needed to drop out but had difficulty getting to medical help or getting back to their own transportation because of closed roads, etc.
http://This message has been edited by maryt (edited Sep-09-2007).