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Thread: Cardio and Glycogen

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  1. #1
    ^^^^ Thanks great information!

    Safe to say that HIIT is bad when trying to restore gylcogen storage becuase it continues to deplete them far after completion. LIT would be better choice so long as it is kept at a minimum time interval not exceeding 60-65% of max heart rate?
    Last edited by edgarr; 02-25-2010 at 11:01 AM.

  2. #2
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    Quote Originally Posted by edgarr View Post
    ^^^^ Thanks great information!

    Safe to say that HIIT is bad when trying to restore gylcogen storage becuase it continues to deplete them far after completion. LIT would be better choice so long as it is kept at a minimum time interval not exceeding 60-65% of max heart rate?
    It depends how long you do a carb up
    for example some people like to do a 36 + hour carb up, and you could slip in a high intensity cardio session.

    the minimum a carb up should be would be 24hours and should include long acting healthy carbs...sweet potatoes, brown rice ect.

    the reason for a longer carb up would be to keep your body from regulating to the consistant low level of insulin and high level of glucogon...but you know, more controversy. There is no set amount of time a carb up should be and some people advocate just one cheat meal per week.

    the simplest way I can explain the whole glycogen thing would start with a quote from my molecular biology prof who was quoting Janis Joplin lol.
    "what's you're body's number one goal when it comes to metabolism?"
    "feed your head"

    fats can't cross the blood brain barrier, therefore the brain can't burn them
    so, no matter what your body is going to maintain a minimum level of glucose in the blood that is not up for debate with any other tissue in your body.

    the brain however can burn ketones to minimize glucose consumption
    but only once you are in ketosis
    muscles love to burn glucose but will burn fatty acids or ketones
    cardiac muscle aka your heart is the only thing that acutally burns fat as a matter of preference.

    fat can become ketones
    most tissues can use ketones in ketosis including the brain

    almost all tissues like to use carbs

    carbs can convert to protein or fat
    protein can convert to carbs
    but fat can become neither protein or carbs

    ketones are not a very responsive fuel source
    high intensity low glycogen cardio = you'll feel yourself hit the wall pretty quick and is not very muscle sparing

    there is plenty of science on the subject, but a lot of controversy and potential debate...and no two people are exactly the same, or are even happy or able to stand following the same routine as maybe someone else.
    Last edited by Kratos; 02-25-2010 at 01:17 PM.

  3. #3
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    Not to be a smartass but "Feed your head" was from White Rabbit, Jefferson Airplane.

    Thank you for asking and answering this question, I have been wondering it for a while. I've been on Keto like Edgarr.

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