Slow down your pace a bit and DO NOT walk. The only way to train your body to get past that initial discomfort is to fight through the urge to walk.
EDIT: I reread your post.I'm surprised that you still hit that wall at two minutes.Are you strictly limiting your walking time and making a habit it out of it, or just allowing yourself to walk when you feel like you're too tired? It sounds to me like you're verging on interval training, but you're not keeping your timing disciplined, so your body thinks that it's ok to walk whenever you feel tired.Interval training works well, but you have to be good about the timing - having a watch helps. For example, the first day you might tell yourself that you'll exercise for 40 minutes, alternating one minute running, then one minute walking. When you're comfortable with this, move up to 40 minutes of running for two minutes, walking for one, etc. until you can comfortably run without having to take frequent walking breaks.http://sportsmedicine.about.com/od/tipsandtricks/a/Intervals.htmMy friend used this method when she first started running and she ran her first marathon last year - she's running another one this year, too.
Start off your first week doing this. MON-20 minTUES-25 minWED-20 minThurs-30 minFri-25 minSat-OFFSun-30 minDoes that sound reasonable? Are you inclined to run 6 days a week? More, less?
Quote from: the marauder on December 11, 2007, 06:20:27 PMStart off your first week doing this. MON-20 minTUES-25 minWED-20 minThurs-30 minFri-25 minSat-OFFSun-30 minDoes that sound reasonable? Are you inclined to run 6 days a week? More, less?This looks about right. I'm going to have to do a bit of research online about training techniques as well, since I'm not sure if I should be running every day or three/four times per week.
Also, if you're serious about this race, I might suggest finding a local running club. People tend to think that they only attract elite runners--but often they have runners of all abilities, looking for training partners of their own abilities.
What I have found to help with running (I run half marathons), is going to the gym and doing either the stairmaster/climber. It helps build up those muscles, while at the same time helping you acclimate to hills.Other than that, you just need to put in the mileage and work through the wall. Go slowly if need be. Good luck!