Back to Ask the Diabetes Team Ask the Diabetes Team

From LaGrange, Georgia, USA:

Why does my fasting blood sugar increase one to two hours after awakening? When I get up at 5:30 a.m., my blood sugar is 100 to 110 mg/dl [5.6 to 6.1 mmol/L]. If I don't eat and recheck my blood sugar at 7:30 a.m., it will jump up to 150 to 200 mg/dl [8.3 to 11.1 mmol/L]. Why?


Blood sugars do not necessarily remain stable if you do not eat anything. They are affected by exercise, stress, illness, among others. If you are exercising in the early morning, before eating breakfast, this mild to moderate rise might be the result of the "stress of exercise." In other words, when you exercise, your pulse goes up, your blood pressure goes up, and some of the hormones that antagonize insulin go up. This is not to say the effect is detrimental, because when you stop, the glucose levels go down. Also, at night, your body begins to produce hormones that antagonize insulin's effects. Blood sugars may rise due to insulin resistance in the early morning.


Original posting 19 Oct 2005
Posted to Other


  Back to Ask the Diabetes Team Return to the Top of This Page

Last Updated: Tuesday April 06, 2010 15:10:04
This Internet site provides information of a general nature and is designed for educational purposes only. If you have any concerns about your own health or the health of your child, you should always consult with a physician or other health care professional.

This site is published by T-1 Today, Inc. (d/b/a Children with Diabetes), a 501c3 not-for-profit organization, which is responsible for its contents. Our mission is to provide education and support to families living with type 1 diabetes.
By using this site, you agree to our Terms of Use, Legal Notice, and Privacy Policy.
© Children with Diabetes, Inc. 1995-2018. Comments and Feedback.