by Ginny on Thu Feb 26, 2009 7:48 pm
Welcome aboard - it's a wacky world, hopefully, you will love it. If not, you can say that you have run a marathon and that will be a great accomplishment.
Someone will be able to answer the Gu question very technically, but I will get started. Your body only has approximately 1 hour of glycogen stores, after that, you are basically running on empty. The gu is a carb with electrolytes to replace what you are losing through sweat, etc. I would highly recommend practicing using the Gu's during all of your long runs over 12 miles for a couple of reasons. One - many people have stomach issues so using the gu s during training helps you to get accustomed to using them. Also, it is my belief that you body learns to use them more effectively if you use them during training and not just on race day.
I would recommend on your 20 miler, 3 weeks out from your race, that you wear exactly what you will wear on race day, wear your gu s and wear the shoes that you will run the race in, for your 20 miler. I always get a new pair of shoes, break them in for a little while, and then run my last 20 miler in them, a few of the shorter runs during the last 2 weeks, and then the race (I always have less than 100 miles on my marathon race day shoes). I would recommend eating whatever you will eat on race morning for breakfast, on all of your later long runs 16, 18, 20. This way you should have no surprises on race day.
If you are like most runners this will not be an issue, but eating as soon as possible after your long runs is good for recovery. Carbs and protein for me.
Of course, I have to mention the ice bath again. I do an ice bath after all long runs 14 miles and longer. 50-54 degrees for 10-20 minutes (use an aquarium thermometer). speeds recovery
Enjoy the journey. I am excited for you.