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The Question
Sun Apr 14 21:08:36 UTC 2013

Watching the s how tonight April 14, 2013, shouldn't you wait an hour before you exercise when taking insulin? I'm a type 2 since 1999.
Asked By: jess59  
Category: Exercise

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Expert Answers (1)
2013-04-19 08:15:34.0

Dear Jess59,

Actually, there is no problem with exercising moderately right after you eat, assuming that is comfortable for you. I conducted a study a few years ago where we had people with type 2 diabetes do 30 minutes of self-paced walking on a treadmill right after eating a standard dinner meal, and doing so actually keep their post-meal glucose levels from going as high. So, doing light to moderate exercise after eating is actually a good strategy to keep down those post-meal glucose spikes.

However, if you take insulin with meals to cover the carbs that you eat, you just have to be careful to cut back on the insulin dose a little to avoid getting a low blood glucose level. Exercise slows down the absorption of the food in your stomach, as well as using up some of the blood glucose in working muscles.

As for doing intense workouts, those are usually uncomfortable to do with a full stomach, and in those cases it would be helpful to wait an hour or more before you undertake them after eating. Exercising takes some of the blood away from your digestive tract while you are active.
Accreditations: PhD, FACSM
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