Exercise and blood sugar

There is no doubt that exercise yields benefits across a spectrum of health: reduced blood pressure,  reduced inflammation, reduced blood coagulation, better weight control, stronger bones, less depression, reduced risk for heart attack.

Exercise also influences blood sugar. Diabetics understand this best: Exercise reduces blood sugar 20, 30, 50 or more milligrams. A starting blood sugar, for instance, of 160 mg/dl can be reduced to 80 mg/dl by jogging or riding a bicycle. (I recently had brunch at an Indian restaurant with my family. Blood sugar one-hour postprandial: 134 mg/dl. I was sleepy and foggy. I got on my stationary bike and pedalled at a moderate clip for 60 minutes. Blood sugar: 90 mg/dl.)

Could the reduction of blood sugar with exercise be THE reason that exercise and physical activity provide such substantial benefits?

Think about it. Reduced blood sugar:

1) Reduces risk for future cardiovascular events.
2) Reduces glycation of proteins, i.e., reduced glucose binding to proteins like the ones in artery walls and the lenses of your eyes.
3) Reduces blood coagulation
4) Reduces endothelial dysfunction (abnormal artery constriction that leads to atherosclerosis)

This might explain why it doesn’t require high levels of aerobic activity to derive benefit from exercise, since even modest efforts (e.g., a 15-minute walk after eating) reduce blood sugar substantially.

The incredible 33-year, 18,000-participant Whitehall study tells us that a postprandial (after-eating) blood sugar of an impossibly-difficult 83 mg/dl is required to erase the excess cardiovascular risk of blood sugar. Could this simply be telling us that physical activity or exercise is required to suppress blood sugars to these low levels?

It makes me wonder if an index of the adequacy of exercise is your post-exercise blood glucose.



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30 Responses to Exercise and blood sugar

  1. Anonymous says:

    Well… that's very interessting but to be honest i have a hard time seeing it… wonder what others have to say..

  2. automated external defibrillator says:

    Thanks for sharing such a useful article. From personal experience i agree with you.
    Beside all you said there's something in my mind.. Isn't yoga good for blood sugar patients?

  3. Anonymous says:

    For those with significant IR, your intraday, between-meal BG is mainly governed by gluconeogenesis – the formation of glucose from amino acids released by continued protein digestion. A bout of exercise will only briefly reduce your BG to fasting levels, after which it will climb back again to higher levels due to continued protein digestion.

    So exercise can't be used in any simply way to "fix" high post-meal BGs. Rather, it's benefit comes mainly from building more muscle mass, which then results in generally lower BGs.

  4. EMR says:

    Exercise is very useful and good for the body and general health.This with a well balanced diet is a perfect solution towards good health.

  5. christina says:

    I am really thankful to the author of this post for making this lovely and informative article live here for us. We really appreciate your effort. Keep up the good work. . . .

    aerobics

  6. buy jeans says:

    Exercise also influences blood sugar. Diabetics understand this best: Exercise reduces blood sugar 20, 30, 50 or more milligrams. A starting blood sugar, for instance, of 160 mg/dl can be reduced to 80 mg/dl by jogging or riding a bicycle. (I recently had brunch at an Indian restaurant with my family. Blood sugar one-hour postprandial: 134 mg/dl. I was sleepy and foggy. I got on my stationary bike and pedalled at a moderate clip for 60 minutes. Blood sugar: 90 mg/dl.)

  7. Daniel A. Clinton, RN, BSN says:

    Jolly's post interests me. I suspect she's right. I'm sure the body moves blood sugar levels to a desirable range when under physiologic stress, be it higher or lower. Just for most Americans, that means lower.

  8. Weight Loss Pills says:

    I've really enjoyed having a look around your blog today, keep up the good work!

  9. Profit Monarch says:

    It's great when you are just surfing the web and find something wonderful like this!

  10. J says:

    I was actually searching the web to see if I was really weird or not. (still not sure) When I exercise i often see a dramatic spike in my blood sugar. Yesterday after a 4 mile run I was 260ish and have tested into the 160′s-200 on several occasions after exercising….is this as bizarre as it seems? I’m young (in my 20s), healthy, and not-diabetic.

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