I'm at a absolute loss.

By Blackmore Latest Reply 2014-06-03 16:43:39 -0500
Started 2014-06-02 16:30:34 -0500

I've been exercising alot and I'm having my BS swing from 120 to 46 in 20 minute just from bike riding. I'm not taking any fast acting insulin just 42 units of lantus once a day before bed. My a1c is 6.4. I don't understand why it's bottoming out so quick. I'm generally eating 72 carbs be for I go ride and it still won't help.

4 replies

Blackmore 2014-06-03 16:43:39 -0500 Report

Thank you everyone. I've reduced my dose and it's helping. Now it's just a matter of getting the right does for when i know I'll be riding the next day.

Glucerna 2014-06-03 16:40:25 -0500 Report

Type1Lou and jigsaw have excellent suggestions. Type of carbohydrate you eat (slowly digesting vs quickly digesting) before you exercise could play a role. Talk with your doctor and let us know what you discover. ~Lynn @Glucerna

jigsaw 2014-06-03 08:41:41 -0500 Report

In most cases, it's a balancing act with carbs, insulin and of course exercise, for the reasons mentioned by Type1Lou. There is no mystery, but keep asking questions, especially to your doctor, and get as informed as possible. It's a learning experience for most of us, and an open mind with a desire to learn will solve most situations encountered.

Type1Lou 2014-06-02 17:12:34 -0500 Report

By exercising, you are increasing your body's sensitivity to insulin…so, when you exercise, you need less insulin than when you do not exercise. If you know ahead of time that you'll be biking, your doctor may suggest you take less Lantus the night before. I use an insulin pump and when I do a brisk 3 mile walk (45 minutes), I have to suspend my basal insulin delivery from 1/2 before the walk, during the walk and 1/2 hour after the walk to prevent a low blood sugar. Lantus provides you with your basal insulin. Definitely discuss this with your doctor before making any adjustments to insulin. You may not be allowing enough time for the food you eat prior to your ride for its glucose to get into your system…again, discuss with your doctor. I love using the pump because it gives me much more flexibility in dosing the insulin, both basal and bolus, depending upon what I'm doing. Prior to pumping I used Lantus and Novolog.

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