Diabetics who run Marathons!


Diabetics who run Marathons!

Diabetics who run Marathons!

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Comment by JiMMy on October 3, 2013 at 2:11am

I've had to give up wearing my G4 sensor for my Dexcom this summer. I'm a heavy sweating person when I run. I've tried IV prep and similar products. Tape. Etc.... but 2 out of 3 times the sensor falls out by the time I'm hitting miles 5 to 7. Thankfully I've felt or witnessed it falling. So I've not lost my sensor yet. But with training for the Twin Cities Marathon I've just decided to suspend using it till mid October. I don't have the same issue with my inset for my pump. I've always thought the Dexcom needs to upgrade what they use to be more aggressive.

Comment by illinoisrunner on September 24, 2013 at 6:08am

Thanks. I suppose I am doing ok but, listening to some of you on this thread makes me believe I can do better. Let me clarify that when I typically eat something as I am getting dressed for a run and leave a few minutes after I do not bolus. I usually wake up check my BG if it less than 150 I eat something and do not bolus. I know it spikes me for a few but when I am back from my runs it is usually ok. I am going to start checking more often and see where I stand. I have a 12 miler this weekend so I can at least practice a little more. Thanks everyone.

Comment by Jerry Nairn on September 23, 2013 at 7:06pm



My Dexcom sometimes gives me some trouble on long runs. This is less likely to happen if you put it in a baggie. I think that's often a source of trouble as a little moisture gets into the port.

As Bill King wrote about earlier in this thread, there can also be problems caused by a little moisture getting between the sensor and the transmitter. Twice in the past three weeks I've had my Dexcom stop giving readings, then I pressed down hard on the transmitter for a while, and within a mile it was showing reasonable numbers again.


I'm glad you're daring to wear your pump on race day.

I'm not sure you've ever expressed that you understand about meal boluses before a long run. Eating well three hours before your start rather than as you leave the house, and more importantly bolusing more than 3 hours before, would make a big difference in the insulin in your system at the start of your run.

If your blood sugar is dropping in the first hour of your run, it's not because you're wearing your pump. It's because of insulin that was already in your body at the start.

Concerning the desire to have a sandwich, I think it could totally work. There's just no more time to experiment before race day, so think about it for your next marathon. :-)

We didn't always have gels and gatorade, and they're not a requirement. Many excellent performance are achieved with cookies, gummi bears, pbjs, orange juice, defizzed coke, koolaid...

I ran a good, hilly 14.5 yesterday, and felt really great. Beautiful weather here. I'm looking forward to little 10 mile race on October 5. It will be fun to do a race I've done enough training for.

Good luck at the races!

Comment by illinoisrunner on September 23, 2013 at 5:14pm

Thanks for sharing. At home I had only kept my pump on twice after chatting with you all and I had not so great experiences with that. I stick with that 20/20 rule with fuel intake and it seems to work with me without the pump. What you just reminded me makes sense though about insulin helping to control that fuel. During the 20 I felt like I was running out of energy at about 16 miles. I did not check my BG though. I kept fueling and that probably was a mistake. I also took a couple dixie cups of Gatorade which I have learned should not be mixed with GU gels.... Too much sugar at once. Now at the end of 18 I started getting under control and focused and kept up and finished fairly strong and once it was over I actually felt good. Once I ate something real I felt great.
I am a little worried now for chicago as I am out of the "LONG" runs to practice. I guess for Chicago I will wear my pump and decrease my basal to 10% and check my BG a couple times and see how it goes. I just want to finish.
I have to say though even with that 20/20 rule I feel like I am eating too often. Sometimes I feel maybe in the middle of a long run I'd be better to pack a half sandwich :) in my belt bag. I didn't see many others fueling like I was yesterday. Does my size have as much to do with this? 6ft1 ish 215lb. I literally feel hungry after about 12 miles. This is tough. I have read for normal folks eat a carb rich breakfast 3 hours before the race. I have typically eaten a cliff bar and a banana as I walk out the door from home on training runs. This journey is awesome I just need to finish figuring it out for myself. Thanks everyone.

Comment by acidrock23 on September 23, 2013 at 4:18pm

Thanks for the report illinoisrunner. What made you ditch your pump? Try to pick a race pace and run at it. I suck at doing running math or keeping track of my pace from the timers on the course but I have a Garmin although, perhaps oddly, I had a great marathon in 2012 when I forgot it. You can make up for lost energy with fuel if you have insulin to process it. I remember from my initial diabetes education that someone mentioned insulin is the key to allow cells to convert sugar into energy so it makes sense to have some along. 3 or 4 hours is a long time to tough it out and the last miles can be brutal. Another thing to consider in Chicago is that the streets there are mostly concrete which is a different ride than we get on the happy trails in the suburbs. All of that will make the last 6 miles harder than you might think. I got a breeze of energy about 20, as I saw my family and my daughter and her friend ran a block or so with me (in Converse and Uggs, eeek...) but the end is still hard. No insulin makes it a lot harder I think, which might be recounted somewhere back in 2011, when I had a set pull out and then pump failure on the 070211 run.

Comment by illinoisrunner on September 22, 2013 at 4:44pm

So I finished my Fall 20 today. It went well. I think I kept my pace a little to high in the beginning. As I approached 16 miles I had some issues. I had to make the decision to wear my pump or not and I did not. I tested just when the race was over and I was 257 :(
Today was a major learning event for me as I embark on chicago in just 3 weeks. I need to start slow for the first 10 miles and check my sugar. That way I don't try to make up for lost energy with fuel. IT's all about balance. I do need make sure I eat a good breakfast ahead of time for Chicago and make sure I am not too high at the start. I am going to reread this thread again for your pointers. Thanks eveyrone.

Comment by Brian on September 15, 2013 at 12:15pm

For some reason my CGM (Dexcom) stops giving readings when I am running. I'm not sure why. I keep my sensor on my upper thigh(quad). I'm guessing this may have something to do with it. Anyone else have cgm issues when running?

Comment by Jerry Nairn on September 14, 2013 at 9:10pm

Well, it's a week ago now, but I suppose I should say I ran the Ventura Marathon last weekend, using the verb "ran" very loosely. I had no training runs over 14 miles, and pretty low total mileage, so I knew I was just going to be surviving it.

I was at 199 at the start. CGM alarmed at 200 in the first mile. I knew I was from a pre-race snack, maybe a little adrenalin even though I had no ambition except to finish.Anyway, it worked out and my CGM was reading 177 with slanting down arrow by 6 miles, where I had gu.

It was perfect weather, foggy at the start, overcast all day.

I tested at the half, the turnaround at Port Hueneme, and the fingerstick said 144, CGM said 147. Had another gu.

I walked as much as ran after 15 miles. Had another gu at 20 miles, tested at 166 at the finish. 5:35.

Not a great performance, just another marathon. Not bad with the blood sugar management.

Comment by Brian on September 14, 2013 at 4:10pm

Had a really nice 8mile trail run today. A lot of the trails & roads are still flooded here in Colorado. The storms have been incredible!

Comment by acidrock23 on September 14, 2013 at 2:20pm

That's awesome Illinoisrunner! I'm sorry I missed your 082413 post but that looks really great as well, 117 is a smooth number to have for 18 miles, 2-3000 calories, etc. Have a great run next weekend. I know some folks who are running there but I'm continuing slacking off, just 10 miles today, piece of cake! Oh wait, can we eat that?


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