FreeStyle Navigator on a bike ride-diabetes tool

Howdy again,

Training has been going good as of late. I have my system pretty down now, and am enjoying life. I wanted to give a post not so much about the wacky basal rate changes, but more about an actual bike ride.

Yesterday, on the phone by 8am doing the usual. At 9:30 eat breakfast (2 packs of oatmeal) with 3 units of Apidra. Apparently I misjudged as I went up a bit, and had to do a correction of 2 units, which at 11am had me dropping. I think at one point I was 142 with an arrow straight down, so I snacked on some juice, had an apple, and leveled off at 107 by 11:15. I had a conference call set up for 12, and then planned to hit the bike for a 4 hour training day immediately after. At 11:45 I had 2 more packets of Oatmeal (no bolus,) or 60 gms of carbs, and the arrow began to go up. By the time I left the house at 12:15, I was at 148 with an arrow pointed slightly up.
Quick arrow definitions:
If it is going straight up or down, it means blood sugar is change at least 2 points per minute, sometimes more.
If it is at a 45 degree angle, then it is changing at 1 point per minute. Very helpful to plan ahead.

I knew I was going up. I set out on the ride with 3 almond bars, at 160 calories each, a banana, a cliff bar, Dex4, 1 bottle of water, and 1 Gatorade.

25 minutes into the ride I was 160, with no arrow. This meant that I was leveling off, and I was thinking I would either flat line, or begin to drop. 15 minutes later, I checked the Navigator, and I was at 148, so the drop had begun. I drank some water (fluid before food helps digestion) and then ate the banana. 1 hour into the ride, I was at 118, so I ate a almond bar. 20 minutes later, was at 111, so I ate another almond bar, this time with Gatorade in advance. I am not riding a real fast pace right now, so I am very comfortable riding with a blood sugars between 90-160. If I were racing, I would want them higher, say 130-180. At 1.5 hours I was at 99, with flat arrow, but noticing a slight downward trend. I ate my last almond bar (these things are really good!!!) drank some Gatorade, and I knew I would be good. I did not look at Navigator until about 2 hours 20 minutes into the ride, when it got to 91. I stopped as I needed fluids, got a coke, and Gatorade. I drank about half the coke (40 gms carbs) on the spot, and then put the rest in my bottles. I rode the rest of the way without looking. I knew I was good, felt good, and continued to take a coke/Gatorade mix in for the last 1-1.5hrs. Should have had more though, as when I got home I was 88 with an arrow pointed straight down.

The recovery process: 88 arrow straight down: Went straight for about 45 gms carb/15 gm protein from Chocolate milk, then put 162 gms of pasta on the stove. This is about 120 gms of carbs. I ate the pasta, and then bolused 5 units of Apidra. Blood sugar went up to 148 before dropping, and 1.5 hours after my ride I had some Dex4, and an apple which leveled me out, before grabbing sushi with my brother Jack at 7:30, or 2.5 hrs after my ride. Typical dose for sushi would have been 5 units, but I did 2, and blood sugar was great!
Before ride carb/insulin ratio seemed to be about 15/1, and after ride 30/1.
Exercise does make a difference.
Last night continued on my split dose Lantus, with a 4 unit bolus of Lantus at 10pm.
Then Southpark, and asleep by 10:35...

That is a very typical day, and how "my" body works for training. I hope this helps.
Have a great day.

Phil
Team Type 1