I’m hoping to tap into the collective wisdom here regarding how biking affects blood glucose levels. I used to be an avid cyclist, but ever since my diagnoses last year, I’ve been a little hesitant to spend much time on the bike because I find nothing lowers my blood sugar faster than biking, even if it’s just my 15 morning ride into work. So now I find the idea of going for a 4-hour ride a little scary. I’ve never had an incident on the bike, but I see the sudden crashes on my Dexcom. And about a month ago I did a ride with my wife, and despite my constant ingesting a glucose tablets, my blood sugar hovered between 60 and 70 for the last hour of a 2-hour ride. I just couldn’t get it up.
So my question is this: is this real, or is this perhaps something happening inside my interstitial fluid that the Dexom is measuring? The reason I wonder if it’s not something in the interstitial fluid is that the response seems to be almost immediate, there is no 15 minute lag as you would expect. As soon as I start biking, the Dexcom starts falling. From what I understand there is typically a 15-minute lag between real blood glucose and the Dexcom reading. So how could it start falling immediately if it there is that lag?
I think the next time I do a long ride I will take my meter and measure myself every half hour or so to see what’s happening. But regardless, I was wondering if anyone else has problems keeping their blood sugars up while biking and what you do to fix it.
Thanks in advance.