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Get Moving! New Physical Activity Guidelines! (Part 4)
November 10, 2008
This week, we’ll wrap up our series on exercise. I hope that at least some of this information has been useful and relevant for you, with the belief that physical activity is one of the cornerstones of diabetes self-management.
Exercise and Hypoglycemia
Not everyone with diabetes is at risk for hypoglycemia, however. Those who are include people who take insulin and people who take certain types of diabetes pills, such as the following.
You have practically no risk of hypoglycemia if you take metformin alone, however.
Remember that physical activity lowers blood glucose by enhancing the action of insulin. In other words, when you’re exercising, insulin helps your muscles and cells use glucose for fuel, thereby lowering the amount of glucose in your blood.
You can see why exercise is so beneficial for blood glucose control. However, if your insulin or diabetes pills are “peaking,” or working at their hardest, there’s a very real chance that your blood glucose will drop too low, either during or after exercise. In fact, hypoglycemia may occur up to 24 hours after you’ve stopped exercising (called the “lag effect”); this happens because your muscles draw glucose from your blood to replenish their glycogen (glucose) stores.
To make sure you stay safe while exercising, here are a few pointers for lowering your risk of hypoglycemia:
Ideally, your blood glucose should be above 110 mg/dl after exercising. If it’s below 110, you’ll need to eat another 15 grams of carb.
Easy Ways To Be Active
You can probably think of some other ways to be active, too.
If you’d like to check out the 2008 Physical Activity Guidelines for Americans, here’s the link: www.health.gov/PAGuidelines/pdf/paguide.pdf.
I’ll end with a quote from Dr. Elliott P. Joslin, 1924:
“It is better to discuss how far you have walked than how little you have eaten.”
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