This morning I ran 6.5 miles at a 7:20-7:30 pace, 15 seconds quicker than my target marathon pace. I ran a 4-mile warm up, checked my blood sugar – it was 130 – took a gel and started my run. I ran the 6.5 miles without stopping and although the pace wasn’t supposed to be hard for me, it was. When I was done I checked my blood sugar again and it was 172.
On Thursday morning I am running my last long run before the marathon. The fatigue I felt during my run this morning doesn’t bother me so much, I imagine that it’s a result of all the hard training – Friday’s half marathon and that fact the I ran intervals yesterday.
What’s bothering me, really bothering me, is my blood sugar.
When I finished my run this morning I expected my blood sugar to be somewhere in the vicinity of 100 or at least back to where it was when I took my gel. That would mean that during a long run, or a marathon, this would be the time to take another gel. In all of my past marathons, and during training I took a gel every 6-7 miles (40-50 minutes). That routine kept my blood sugar between 130 and 200, and kept my body fuelled.
But now it’s as if something has changed. I run 10 miles and my blood sugar doesn’t seem to go down at all. During the half marathon when I stopped to check my blood sugar, 5 miles after my only gel, my blood sugar was 187.
You could think that this was a good thing – not going low when I run, but it’s actually a disaster. If my blood sugar doesn’t go back down after 6-7 miles I can’t take gels and if I can’t take gels, I won’t have the energy needed to keep up my pace. I might not even have enough energy to finish the race.
This has made me very nervous, especially because I’m running out of experimentation time. If I had a little longer I might try playing with my temp basal rate, setting it at 40% or 50% instead of 30%. But I’m too scared to try anything like that now. So I guess I’ll run my last long run sticking to what has worked in the past and hope that all the pieces fall into place.
Right now, it feels like my diabetes has become exercise resistant.