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  1. #1
    Registered User proteinman's Avatar
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    When does our body use liver glycogen?

    When does our body use liver glycogen? Muscles are fueled by muscle glycogen, then at what moments does our body fully utilize liver glycogen?

    Thanks for the responses!
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  2. #2
    Registered User afrolov's Avatar
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    When your blood glucose levels are depleted.
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  3. #3
    Registered User proteinman's Avatar
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    When does blood glucose get depleted? It starts to use liver glycogen first, not muscle glycogen?
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    Heavy Lifter Melkor's Avatar
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    If I remember correctly....

    Your liver is a storage tank for glycogen. When your muscles get low, glycogen is released into the blood stream from the liver and taken up into the muscle cells for energy. It's like having an extra battery backup.
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  5. #5
    Registered User proteinman's Avatar
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    If liver glycogen is the "extra battery" for muscle glycogen, then the liver glycogen seems like it would rarely be used. The muscles hold a lot of glycogen. So it seems like the "extra battery" would kick in only after long and grueling workouts.

    Since liver glycogen is rarely used, it must be full most of the time. Since it is full most of the time, that means we should always avoid fructose and fruits?!

    I mean the liver glycogen tank won't be emptied out except for long and grueling workouts! I guess only then it is safe to eat some fruits or fructose.

    Does this sound right?!!
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  6. #6
    Member LadyLisa's Avatar
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    I always thought that we used muscle glycogen during exercise and the rest of the time we primary run off blood glucose supplied by our food and liver glycogen.

    ??????
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    Registered User afrolov's Avatar
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    The most important function of liver glycogen stores is to support not the muscles when blood glucose is low, but the brain.
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  8. #8
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    Originally posted by LadyLisa
    I always thought that we used muscle glycogen during exercise and the rest of the time we primary run off blood glucose supplied by our food and liver glycogen.

    ??????
    BUMP, basically, if you are following a normal carb diet, you are using liver glycogen right now. Liver glycogen supports day to day acitivites which are not very demanding like wathicng TV, walking.... Its purpose it to keep blood glucose stable. When you workout (anaerobicallhy0 you dont use liver glycogen, you use muscle glyocgen. This is the problem when trying to lose fat, liver glcyogen needs first to be depleted to enhance lypolisis. This is the reason when cutting up, despite the hype about eating fruit as its regarded as low calorie and healhty, is bad, becuase the fructose replenishes liver glycogen and not muscle glycogen. The amount of fructose, however, varies with types of fruit.
    Good luck
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  9. #9
    Heavy Lifter Melkor's Avatar
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    Good info, thanks. It looks like I remembered wrong lol.

    Lemme make sure I really got what you said...

    Basically muscle glycogen is used for strength, heavy lifting type exercises, and liver glycogen is what maintains your blood glycogen levels for normal activities, like walking around and other day to day stuff. Correct?
    A noble spirit embiggens the smallest man.

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  10. #10
    Registered User proteinman's Avatar
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    Does liver glycogen get used up during aerobic exercizes like running?
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  11. #11
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    Originally posted by proteinman
    Does liver glycogen get used up during aerobic exercizes like running?
    yes
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  12. #12
    Registered User proteinman's Avatar
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    Ah, so only runners need fruit, but not bodybuilders.

    Fruit will only add to the liver glycogen which bodybuilders don't want. We want depleted liver glycogen levels to lose fat for cutting, and low liver glycogen levels for bulking to prevent fat gain.

    Does this sound right?!
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  13. #13
    Studying Nutrition 24/7 ManOfSteel2003's Avatar
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    The liver holds approx. 70-90g of glycogen (although keep in mind that it is usually near full already), while the muscles hold around 300g (plus or minus depending on how much muscle you have). I think fruit doesn't need to be COMPLETELY avoided, especially while bulking. But I would certainly only eat it in the morning, when glycogen levels aren't at their highest. That way, you ensure a little liver glycogen saturation (not a bad thing in the morning, unless you are cutting), and also include other carbs like oatmeal to help replenish muscle glycogen. Fruit's natural antioxidant effects are something I don't want to drop completely, they are far superior to supplemental vitamins. Just keep the fruit intake low.
    Currently bulking...goal 3lbs+ increase every month.
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  14. #14
    Registered User Blindfaith's Avatar
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    your body will start to use liver glycogen when you are depriving your body of carbohydrates and then when you you have depleted all your liver glycogen you will then go into ketosis where your liver will than start to produce ketone bodies. Which isnt totally healthy. This is common in people who are doing a low carb diet such as Atkins or a keto like diet also people who have diabetes have this problem as well.

    cheers
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  15. #15
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    how about lactose in milk there is a lot on milk sugar in milk products and how does your body use or store this
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    Studying Nutrition 24/7 ManOfSteel2003's Avatar
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    Originally posted by sticklegs
    how about lactose in milk there is a lot on milk sugar in milk products and how does your body use or store this
    It is fairly low GI but high II
    Currently bulking...goal 3lbs+ increase every month.
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  17. #17
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    Originally posted by sticklegs
    how about lactose in milk there is a lot on milk sugar in milk products and how does your body use or store this
    I have tried to research this somewhat and could not come up with exactly how lipogenic lactose is. There seems to be some debate as to which glycogen stores it fills
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    Smile

    arent you straying from your home there porkchop?!?!
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  19. #19
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    Originally posted by Blindfaith
    arent you straying from your home there porkchop?!?!
    lol, sorry I'll be a good boy from now on
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