Exercise and BG spikes

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Exercise and BG spikes


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Old 11-01-2012, 11:31   #1
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Default Exercise and BG spikes

Hi Guys,
I need some answers to build up a strategy

I normally do one hour of cardio everyday and that causes my BGs to rise a few points which is not really a big issue now (e.g. from 80 to 110) because it drops right back to where it started within 15-20 minutes

But when I play squash and swim (which I have restarted recently after several years) the spikes are huge (around 120-130). Yesterday it went up to 148 and took 45 minutes to drop.

Now 148 is good enough to cause damage and also spoil my hba1c. What do I do ?

Please suggest some solutions. Do I restart on my metformin to stop these liver dumps ?

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Old 11-01-2012, 11:56   #2
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Have a snack about 45 minutes before the activity. The idea is to use up available glucose instead of having the liver dump, which can be more than you'd like.

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Old 11-01-2012, 15:28   #3
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Have a snack about 45 minutes before the activity. The idea is to use up available glucose instead of having the liver dump, which can be more than you'd like.
Why does the liver dump at all? Whenever I exercise, my glucose goes down about 10-15 pts. And this after an hour jog. Does this mean that eventually I'll liver dump too? Any info on what is causing the liver dump?

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Old 11-01-2012, 16:01   #4
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Why does the liver dump at all? Whenever I exercise, my glucose goes down about 10-15 pts. And this after an hour jog. Does this mean that eventually I'll liver dump too? Any info on what is causing the liver dump?
A liver dump is the body's way of saying I am expending energy. Give me a shot of glucose to keep going. I find as long as I keep my carbs low enough my liver has no to little glucose to release.

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Old 11-01-2012, 16:33   #5
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Why does the liver dump at all? Whenever I exercise, my glucose goes down about 10-15 pts. And this after an hour jog. Does this mean that eventually I'll liver dump too? Any info on what is causing the liver dump?
As I recall you are a runner. Your body has become accustomed to using fats as long as you stay under (I think 80%) VO2 Max. If you go beyond that your body will have to use glucose in an anaerobic environment to give you energy. Your liver will then contribute only after your muscle glycogen supply is depleted. If you were to do resistant training you would probably see more of a liver contribution, as resistant training is fueled more by glucose than fats.

The same is probably happening to Tony, cardio is not causing liver contribution but squash and swimming probably are using more glucose than fat. I found that peanut butter is my friend when doing intense work outside.

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Old 11-01-2012, 16:40   #6
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A liver dump is the body's way of saying I am expending energy. Give me a shot of glucose to keep going. I find as long as I keep my carbs low enough my liver has no to little glucose to release.
Ok, I just learned a lot from you right now. So, with my marathon running (i.e., or longer runs) if i start to run out of fuel, and I don't eat one of those fancy gels, then my liver will add glucose to the mix (if I've eaten carbs) and then will this new glucose be burned by my running at that moment and then when I'm done running, it's OK? This may be too technical but wondering if this could be a good tihng (the liver dump) in my case since I'm also doing a few longer runs coming up (2 hours) and thought what could I do to keep full of energy an maybe the liver will do it for me?

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Old 11-01-2012, 16:43   #7
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As I recall you are a runner. Your body has become accustomed to using fats as long as you stay under (I think 80%) VO2 Max. If you go beyond that your body will have to use glucose in an anaerobic environment to give you energy. Your liver will then contribute only after your muscle glycogen supply is depleted. If you were to do resistant training you would probably see more of a liver contribution, as resistant training is fueled more by glucose than fats.

The same is probably happening to Tony, cardio is not causing liver contribution but squash and swimming probably are using more glucose than fat. I found that peanut butter is my friend when doing intense work outside.
Ok, this is also very good to know. Thank you... So, my last comment regarding liver dump during a run may be explained now.. and thanks for the peanut butter tip. Although I do have a spoon full now and then after a meal, I'm wondering if I should do what you do and have a spoon full (with water) before I go running?

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Old 11-01-2012, 16:46   #8
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Ok, I just learned a lot from you right now. So, with my marathon running (i.e., or longer runs) if i start to run out of fuel, and I don't eat one of those fancy gels, then my liver will add glucose to the mix (if I've eaten carbs) and then will this new glucose be burned by my running at that moment and then when I'm done running, it's OK? This may be too technical but wondering if this could be a good tihng (the liver dump) in my case since I'm also doing a few longer runs coming up (2 hours) and thought what could I do to keep full of energy an maybe the liver will do it for me?
Your liver should keep you fueled as long as you have adequate glycogen supply stored up. Problem is with most T2's signaling is whacked, so your liver dumps a lot of glucose but your pancreas fails to secrete adequate insulin to compensate. Or your liver dumps far more glucose than what is required, or your insulin resistance goes up and the glucose/insulin mix is unavailable as a fuel source, lot of variables. The only way to find out is try it and test along the way.

Can't help myself but every time I see your name it gives me a chuckle, it conjures up visions of kid working in a grease pit under a car. Grease Dweller.

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Old 11-01-2012, 16:55   #9
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Your liver should keep you fueled as long as you have adequate glycogen supply stored up. Problem is with most T2's signaling is whacked, so your liver dumps a lot of glucose but your pancreas fails to secrete adequate insulin to compensate. Or your liver dumps far more glucose than what is required, or your insulin resistance goes up and the glucose/insulin mix is unavailable as a fuel source, lot of variables. The only way to find out is try it and test along the way.

Can't help myself but every time I see your name it gives me a chuckle, it conjures up visions of kid working in a grease pit under a car. Grease Dweller.
Think of Greece as in "Hornet's nest of fiscal irresponsibility" and not "Olivia Newton John's Grease...." LOL

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Old 11-03-2012, 16:53   #10
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If you keep exercise in the aerobic zones (1,2,3) you will not have large liver dumps, just small ones. The body uses very little glucose to promote fat burning.

If you do anaerobic exercise (puffing/breathing hard) you may experience spikes, as the body requires more glucose when anaerobic. Squash is anaerobic, swimming can be either.

Marathon running is an endurance event and should be done in the aerobic zones. 180 - your age is the basic maximum aerobic heart rate.

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