My best bg-levels during a hike, ever

Woke up with perfect bg’s. Decided we would hike our usual one, up a steep hill for 5 miles, round trip. Breakfast: 2 eggs, 2 bacon, 2 Eggo waffles filled with fresh diced strawberries. Turned on the speak-readings feature for xDrip and hiked with confidence! It was a great day to be out in the sunshine! (the hike began around 8:15 and ended around 10:30). I couldn’t have enjoyed the hike nearly as much without the Dexcom and audible readings, for both convenience and for maintaining better bg control. I took 2U bolus prior to breakfast, then turned down pump basal to just under 50%. As I got to the beginning of the inclined trail, I turned the basal OFF. Resumed it 1/2 way back down, to the 50% rate, when about 1 mile from the end, turned basal back to full. Adjusting basals like this is crucial for me to maintain level/safe bg levels so I won’t have to snack or take corrective boluses.


Well done! Congratulations! Isn’t it wonderful when everything works out just right?

1 Like

Good job! I find temp basals perform better and more quickly than one might expect. When I first heard of the idea of using a temp basal to influence near term BGs, I was skeptical. I thought since the insulin had an onset time of about 15 minutes and a peak of 90 minutes or so, the ability to affect the current BG line would be limited to non-existant.

But it works more quickly than I ever imagined. As an example, here’s a phenomena I watch every day when I disconnect from my pump to shower for 10 minutes. I often see this 30 minute long by 10 mg/dL tall shower bump. There’s only about a 10 minute lag from pump disconnect to an upward deflection in the trace.


Your experience reminds me of Stephen Ponder’s sugar surfing techniques.


Yay–well done, and don’t it feel great when it actually works!

Hardest part for me managing exercise is getting the temp basal right, but it has been easier since I switched to Fiasp. Novolog/Humalog both required me to start dropping my rate about two hours out, which is a real pain if something interferes with your timing. Not to mention when it’s in anticipation of my homeward bike commute I sometimes end up having to drop my basal while still fighting a post-prandial spike, which is really hard to convince myself to do. But Fiasp has a much shorter tail for me–if I drop it to zero, I’ll start seeing my BG start ramping up by the end of an hour, which is a much easier time frame to plan around. Made a huge difference in getting home without going low.

1 Like

Hi there,

Do you mind me asking what type of glucose meter/method you use?

Thank you! :slight_smile:

Dexcom G5, MM 551 pump, S7 phone, and Gear 2 smartwatch. The phone has audible readouts of glucose levels, and both the phone (via a widget on a home screen) and the watch (via notifications) show current interstitial fluid glucose levels, trending arrows and the phone only, has the graph too.


Do they display ISF or IOB?

i meant interstitial fluid glucose levels, and totally botched it. lol

Yeah, I thought you were following movement of your insulin sensitivity factor through the day. It is a good factor to keep in mind when making insulin pump changes but I’ve never heard of someone monitoring it moment-to-moment on personal diabetes electronics! Thank-you for clarifying.