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Fasting and weight loss

Started by Roger Lepine · · Last activity · 19 posts · 868 views

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General fitness, health and nutrition
Published
24 July 2004
Last activity
3 August 2004
Original author
Roger Lepine
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  1. Dear experts,

    Here's an interesting question for you.

    Given: a standard 2000 calorie diet.
    Activity: normal office activity, no exercise
    Weight: 200 pounds, male.

    If a person fasts for, 32-36 hours, say from
    Thursday night, until Saturday morning,

    What can the expected weight loss be for the this
    time period?

    Perhaps 10 glasses of water drunk through this
    time period.

    Remembering my high school science, there is
    the law of conservation of mass.

    Applied to eating, this means, that to gain
    10 pounds, you must consume at least 10
    pounds of food and water. Obviously, a lot
    more than 10 pounds, because so much of the
    food and water is converted to energy, waste,
    and evaporated through the skin.

    With this physics, you cannot eat a few ounzes,
    and gain a few pounds.

    Assume all other things being equal.

    I know that diet has become a religious war
    item these days, and I'm not interested in such.

    Please don't bother speculating about long
    term averages, about eating more when you break
    the fast, etc. Or about exercise, red herrings,
    or other variables that are not in the question.

    Please also don't bother talking about
    whether this is adviseable or not.

    Just the answer please.

    Hopefully based on some kind of science or
    experience, not speculation.

    Thanks a lot

  2. You [censored].

    --
    George UK

    "Roger Lepine" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Dear experts,

    Here's an interesting question for you.

    Given: a standard 2000 calorie diet.
    Activity: normal office activity, no exercise
    Weight: 200 pounds, male.

    If a person fasts for, 32-36 hours, say from
    Thursday night, until Saturday morning,

    What can the expected weight loss be for the this
    time period?

    Perhaps 10 glasses of water drunk through this
    time period.

    Remembering my high school science, there is
    the law of conservation of mass.

    Applied to eating, this means, that to gain
    10 pounds, you must consume at least 10
    pounds of food and water. Obviously, a lot
    more than 10 pounds, because so much of the
    food and water is converted to energy, waste,
    and evaporated through the skin.

    With this physics, you cannot eat a few ounzes,
    and gain a few pounds.

    Assume all other things being equal.

    I know that diet has become a religious war
    item these days, and I'm not interested in such.

    Please don't bother speculating about long
    term averages, about eating more when you break
    the fast, etc. Or about exercise, red herrings,
    or other variables that are not in the question.

    Please also don't bother talking about
    whether this is adviseable or not.

    Just the answer please.

    Hopefully based on some kind of science or
    experience, not speculation.

    Thanks a lot

  3. "Roger Lepine" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Dear experts,

    Here's an interesting question for you.

    Given: a standard 2000 calorie diet.
    Activity: normal office activity, no exercise
    Weight: 200 pounds, male.

    If a person fasts for, 32-36 hours, say from
    Thursday night, until Saturday morning,

    Mostly water loss, instantly gained back on such a short
    fast...and the induction of food cravings that are not
    practically controllable..so a net weight gain.

    I have fasted extensively..to vast benefit however... you
    need to read a few books on fasting, particularly raw
    vegitable juice augmented fasting, You can loose weight
    fasting but the thats not a good use of fasting you will loose
    both lean muscle and fat while fasting...

    its very good for your health if done properly, fatal if not
    done properly especially broken properly after more than 3
    days on say water for instance (I did 30 days on water alone
    one time..not recommended, but useful for some things)
    (Hunger btw totally abates after 5 or 7 days on water). Again
    I DO NOT recommend water fasting. Raw juice fasting is
    vastly better across the broad range of issues)

    Quoted message said:


    What can the expected weight loss be for the this
    time period?

    Perhaps 10 glasses of water drunk through this
    time period.

    Get a few books on fasting. You need plenty of water while
    fasting to remove wastes.

    Quoted message said:

    Remembering my high school science, there is
    the law of conservation of mass.

    not applicable to fasting.

    Quoted message said:


    Applied to eating, this means, that to gain
    10 pounds, you must consume at least 10
    pounds of food and water. Obviously, a lot
    more than 10 pounds, because so much of the
    food and water is converted to energy, waste,
    and evaporated through the skin.

    With this physics, you cannot eat a few ounzes,
    and gain a few pounds.

    Assume all other things being equal.

    I know that diet has become a religious war
    item these days, and I'm not interested in such.

    Please don't bother speculating about long
    term averages, about eating more when you break
    the fast, etc. Or about exercise, red herrings,
    or other variables that are not in the question.

    All those are integral parts your question... none of these
    issues operate in isolation.
    Your attempt to isolate the fasting from other factors such as
    metablism simply doesnt apply... there is always metabolism
    and the amount of excercise you do, walking, even thinking
    etc..bears directly on the answers you seek.

    Ok lets try to oblige you... you are going to fast say
    strapped to a bed so you cant move a muscle, and drink 10
    glasses of water over 36 hours or so.. what will the loss
    be.... answer. virtually zero since you have burned very
    little fat off.. assuming you were not thinking much either...
    to get a firm figure you would measure the heat loss from your
    body (there are formula's related to how cool the room is
    etc)...how much heat is lost in respiration...and in the
    excement..and you could get a close figure... Id say maybe the
    equivalent of 4 oz of fat... except as you were not moving,
    muscle would have been used for fuel too...so maybe 2 oz of
    fat and 2 oz of muscle.

    I broke a leg motorcycle racing at the Placer County Fair
    grounds in 1980 one time...the leg was in a cast for 6 weeks.
    It shunk drastically, I was lean and mean then, all muscle...
    I lost Id day at least half the muscle in that leg in just 6
    weeks due to the immobilization.

    So you see, excercise is a crucial aspect ...further more the
    loss of muscle then reduces the capacity of your calorie
    burning machine...so that when you go back on regular eating,
    the same amount of food then creates fat instead of being
    burned... so you see...its all relevant after all.

    Best you should read some books on the subject... asking for
    short isolated snippets from the NG will not suffice,
    especially if you anounce in advance that you are not
    interested in the linked, and absolutely vital collateral
    issues.

    Quoted message said:


    Please also don't bother talking about
    whether this is adviseable or not.

    a 36 hour fast is almost not even a fast at all in fasting
    circles...I call it a fast though... but you really dont see
    much immediate and lasing benefit until 3 days, thats 72
    hours. ..and that needs in my experience to be repeated for 6
    months or more to reverse a condition noticeably Recent
    research however shows that fsating one day a week improves
    longevity by 30% or so...so there is a long term benefit.

    Quoted message said:


    Just the answer please.

    An 'answer' out of context with its vitally related issues
    is not really meaningful...it might be an answer, but out of
    context, that answer is largely or entirely meaningless.

    Quoted message said:


    Hopefully based on some kind of science or
    experience, not speculation.

    My answers were based on 30 years experience, fasting,
    supervising fasts in others, and reading many books on fasting
    and a few hundred collateral and other health issues... but
    the fact is, until man has reached an all knowing pinacle (and
    currently we have just the barest clues) everything discussed
    contains countless seeds of assumption and speculation.

    Your best bet is to educate yourself...and thats done by
    your own reading, and personal trials ...and asking questions,
    but only as the lesser feature.

    Phil Scott

    Quoted message said:

    Thanks a lot

  4. "George UK" <[email hidden]> wrote in
    message news:[email hidden]...

    Quoted message said:

    You [censored].

    Now George...you have LIBEL'D the glorious [censored] head of all
    good men (looks down, its in repose now), ...when all we had
    here with the OP was an accute case of cranial rectal
    inversion.

    You see my reply to this person of course... see how
    phucking NICE I was...

    No doubt I will be rewarded generously 🙂

    Phil Scott

    Quoted message said:

    --
    George UK

    "Roger Lepine" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Dear experts,

    Here's an interesting question for you.

    Given: a standard 2000 calorie diet.
    Activity: normal office activity, no exercise
    Weight: 200 pounds, male.

    If a person fasts for, 32-36 hours, say from
    Thursday night, until Saturday morning,

    What can the expected weight loss be for the this
    time period?

    Perhaps 10 glasses of water drunk through this
    time period.

    Remembering my high school science, there is
    the law of conservation of mass.

    Applied to eating, this means, that to gain
    10 pounds, you must consume at least 10
    pounds of food and water. Obviously, a lot
    more than 10 pounds, because so much of the
    food and water is converted to energy, waste,
    and evaporated through the skin.

    With this physics, you cannot eat a few ounzes,
    and gain a few pounds.

    Assume all other things being equal.

    I know that diet has become a religious war
    item these days, and I'm not interested in such.

    Please don't bother speculating about long
    term averages, about eating more when you break
    the fast, etc. Or about exercise, red herrings,
    or other variables that are not in the question.

    Please also don't bother talking about
    whether this is adviseable or not.

    Just the answer please.

    Hopefully based on some kind of science or
    experience, not speculation.

    Thanks a lot

  5. George UK' thoughtfully said:

    You [censored].

    Quality post there George, quality! 😉

    --
    http://www.bodybuildingtracker.com
    Track your progress on-line free, no pop-ups or spam. (thanks Pet)
    View my profile: (don't take the proverbial! 🙂
    http://www.bodybuildingtracker.com/member_profiles.php?username=Dundonald

  6. I have found that hunger disappears after about 24h of fasting.
    Most people in the western world are addicted to caffiene. If you fast
    without caffiene you will feel more tired and there's about a 50/50 chance
    that you will also have very bad headaches.
    A coffee, water and vitamin pill fast will leave yoiu feeling better but I
    don't recommend it..
    Most of the weight lost in the first couple of days of fasting will be the
    contents of your guts which you will flush down the toilet - (the contents
    not the guts).
    --
    Mike Collins
    UK
    Mike&heather-at-oakwellmount-dot-freeserve-dot-co-dot-uk

  7. Phil Scott' thoughtfully said:


    "George UK" <[email hidden]> wrote in
    message news:[email hidden]...

    Quoted message said:

    You [censored].

    Now George...you have LIBEL'D the glorious [censored] head of all
    good men (looks down, its in repose now), ...when all we had
    here with the OP was an accute case of cranial rectal
    inversion.

    You see my reply to this person of course... see how
    phucking NICE I was...

    No doubt I will be rewarded generously 🙂

    30 days of fasting? Why?

    <snip>

    --
    http://www.bodybuildingtracker.com
    Track your progress on-line free, no pop-ups or spam. (thanks Pet)
    View my profile: (don't take the proverbial! 🙂
    http://www.bodybuildingtracker.com/member_profiles.php?username=Dundonald

  8. "dundonald" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    "Phil Scott" <[email hidden]> thoughtfully


    Quoted message said:


    Quoted message said:


    "George UK" <[email hidden]> wrote


    in

    Quoted message said:
    Quoted message said:

    message news:[email hidden]...

    Quoted message said:

    You [censored].

    Now George...you have LIBEL'D the glorious [censored] head of


    all

    Quoted message said:
    Quoted message said:

    good men (looks down, its in repose now), ...when all we


    had

    Quoted message said:
    Quoted message said:

    here with the OP was an accute case of cranial rectal
    inversion.

    You see my reply to this person of course... see how
    phucking NICE I was...

    No doubt I will be rewarded generously 🙂

    30 days of fasting? Why?

    I read the wrong book first. and I are an egineer... 'if a
    little is good, overkill must be better'... I have not always
    been a paragon of brilliance.

    Phil Scott

    Quoted message said:


    <snip>

    --
    http://www.bodybuildingtracker.com
    Track your progress on-line free, no pop-ups or spam.


    (thanks Pet)

    Quoted message said:

    View my profile: (don't take the proverbial! 🙂


    http://www.bodybuildingtracker.com/member_profiles.php?username=Dundonald

  9. Start an exercise program or you won't be healthy no
    matter how much weight you lose.

    "Roger Lepine" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Dear experts,

    Here's an interesting question for you.

    Given: a standard 2000 calorie diet.
    Activity: normal office activity, no exercise
    Weight: 200 pounds, male.

    If a person fasts for, 32-36 hours, say from
    Thursday night, until Saturday morning,

    What can the expected weight loss be for the this
    time period?

    Perhaps 10 glasses of water drunk through this
    time period.

    Remembering my high school science, there is
    the law of conservation of mass.

    Applied to eating, this means, that to gain
    10 pounds, you must consume at least 10
    pounds of food and water. Obviously, a lot
    more than 10 pounds, because so much of the
    food and water is converted to energy, waste,
    and evaporated through the skin.

    With this physics, you cannot eat a few ounzes,
    and gain a few pounds.

    Assume all other things being equal.

    I know that diet has become a religious war
    item these days, and I'm not interested in such.

    Please don't bother speculating about long
    term averages, about eating more when you break
    the fast, etc. Or about exercise, red herrings,
    or other variables that are not in the question.

    Please also don't bother talking about
    whether this is adviseable or not.

    Just the answer please.

    Hopefully based on some kind of science or
    experience, not speculation.

    Thanks a lot

  10. dundonald said:

    30 days of fasting? Why?

    Perhaps he's really David Blaine!

    --
    http://gymratz.co.uk - UK's best bodybuilding supplements,gym equipment.
    http://gymratz.co.uk/hot-seat.htm - Live web-cam!
    TRADE PRICED SUPPLEMENTS for Personal Trainers or individual purchase.
    http://trade-price-supplements.co.uk

  11. George UK' thoughtfully said:


    Quoted message said:
    Quoted message said:

    You [censored].

    Quality post there George, quality! 😉

    Sometimes laziness can be mistaken for genius.

    Just a lazy post on my behalf.

    The guy is a bit of a rude [censored] though.

    🙂

    --
    http://www.bodybuildingtracker.com
    Track your progress on-line free, no pop-ups or spam. (thanks Pet)
    View my profile: (don't take the proverbial! 🙂
    http://www.bodybuildingtracker.com/member_profiles.php?username=Dundonald

  12. Thanks for the answer. Although, you told me all the things
    that I pretty much knew anyway.

    Just for everyone's info, I do exercise. It's just that during
    the 36 hour fast, I didn't exercise. I know that I would be
    much too hungry otherwise. I normally eat after working out
    and feel really tired if I don't. Also, my body needs the
    protein after working out.

    Quoted message said:
    Quoted message said:

    Here's an interesting question for you.

    Given: a standard 2000 calorie diet.
    Activity: normal office activity, no exercise
    Weight: 200 pounds, male.

    If a person fasts for, 32-36 hours, say from
    Thursday night, until Saturday morning,

    Mostly water loss, instantly gained back on such a short
    fast...and the induction of food cravings that are not
    practically controllable..so a net weight gain.

    No, I can feel my waist getting thinner, and my pants getting
    looser.

    Quoted message said:

    (I did 30 days on water alone
    one time..not recommended, but useful for some things)
    (Hunger btw totally abates after 5 or 7 days on water). Again
    I DO NOT recommend water fasting. Raw juice fasting is
    vastly better across the broad range of issues)

    So you speak from good experience.

    How much weight did you lose on this fast over the 30 days?

    Quoted message said:
    Quoted message said:

    Remembering my high school science, there is
    the law of conservation of mass.
    With this physics, you cannot eat a few ounzes,
    and gain a few pounds.

    I already know that there are many variables. Of course there are.

    But ultimately, given these same variables, there will be a
    relevant range.

    Could I expect to lose:

    5 grams?
    5 ounzes?
    5 pounds?
    5 kilograms?

    I'm sure we will all agree that 50 kilograms is out of the relevant
    range. Although, I'm sure there is a speculator out there somewhere
    who would caution that it -could- in fact happen in 36 hours. Duh.

    If I fast once a week, for six months, other things being equal,
    what would the realistic weight loss be? Per week, on average?

  13. "Roger Lepine" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Thanks for the answer. Although, you told me all the things
    that I pretty much knew anyway.

    Just for everyone's info, I do exercise. It's just that during
    the 36 hour fast, I didn't exercise. I know that I would be
    much too hungry otherwise. I normally eat after working out
    and feel really tired if I don't. Also, my body needs the
    protein after working out.

    Quoted message said:
    Quoted message said:

    Here's an interesting question for you.

    Given: a standard 2000 calorie diet.
    Activity: normal office activity, no exercise
    Weight: 200 pounds, male.

    If a person fasts for, 32-36 hours, say from
    Thursday night, until Saturday morning,

    Mostly water loss, instantly gained back on such a short
    fast...and the induction of food cravings that are not
    practically controllable..so a net weight gain.

    No, I can feel my waist getting thinner, and my pants getting
    looser.

    Quoted message said:

    (I did 30 days on water alone
    one time..not recommended, but useful for some things)
    (Hunger btw totally abates after 5 or 7 days on water). Again
    I DO NOT recommend water fasting. Raw juice fasting is
    vastly better across the broad range of issues)

    So you speak from good experience.

    How much weight did you lose on this fast over the 30 days?

    Quoted message said:
    Quoted message said:

    Remembering my high school science, there is
    the law of conservation of mass.
    With this physics, you cannot eat a few ounzes,
    and gain a few pounds.

    I already know that there are many variables. Of course there are.

    But ultimately, given these same variables, there will be a
    relevant range.

    Could I expect to lose:

    5 grams?
    5 ounzes?
    5 pounds?
    5 kilograms?

    I'm sure we will all agree that 50 kilograms is out of the relevant
    range. Although, I'm sure there is a speculator out there somewhere
    who would caution that it -could- in fact happen in 36 hours. Duh.

    If I fast once a week, for six months, other things being equal,
    what would the realistic weight loss be? Per week, on average?

    12.71 lbs. total (or .489lbs/wk) ..... Geez, aren't you listening?!?!?!

  14. "Spammers_Should_Be_Shot" <[email hidden]> wrote in message news:<[email hidden]>...

    Quoted message said:

    "Roger Lepine" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    If I fast once a week, for six months, other things being equal,
    what would the realistic weight loss be? Per week, on average?

    12.71 lbs. total (or .489lbs/wk) ..... Geez, aren't you listening?!?!?!

    that's assuming the loss is from fat, not muscle. Not a safe
    assumption when one is talking about starvation.

  15. Roger Lepine said:

    Given: a standard 2000 calorie diet.
    Activity: normal office activity, no exercise
    Weight: 200 pounds, male.

    If a person fasts for, 32-36 hours, say from
    Thursday night, until Saturday morning,

    2000 kcal/day x 1.5 days = 3000 kcal

    One pound of fat contains about 3000 kcal, so if you didn't lose any lean body
    mass, you'd lose about 1 lb. You will, of course lose some lean body mass,
    and lean body mass is heavier per kcal than fat, so the 1 lb. is probably an
    underestimate.

    -Jay

  16. Jay Tanzman said:
    Roger Lepine said:

    Given: a standard 2000 calorie diet.
    Activity: normal office activity, no exercise
    Weight: 200 pounds, male.

    If a person fasts for, 32-36 hours, say from
    Thursday night, until Saturday morning,

    2000 kcal/day x 1.5 days = 3000 kcal

    One pound of fat contains about 3000 kcal, so if you didn't lose any
    lean body mass, you'd lose about 1 lb. You will, of course lose some
    lean body mass, and lean body mass is heavier per kcal than fat,

    Can you explain that please?

    Quoted message said:

    so
    the 1 lb. is probably an underestimate.

    -Jay

    --
    Bully
    Protein bars -- http://www.proteinbars.co.uk
    Everything else -- http://www.proteinbars.co.uk/tmof.html

  17. Bully said:
    Jay Tanzman said:

    Roger Lepine wrote:

    Quoted message said:
    Quoted message said:

    Given: a standard 2000 calorie diet.
    Activity: normal office activity, no exercise
    Weight: 200 pounds, male.
    If a person fasts for, 32-36 hours, say from
    Thursday night, until Saturday morning,

    Quoted message said:

    2000 kcal/day x 1.5 days = 3000 kcal

    Quoted message said:

    One pound of fat contains about 3000 kcal, so if you didn't lose any
    lean body mass, you'd lose about 1 lb. You will, of course lose some
    lean body mass, and lean body mass is heavier per kcal than fat,

    Can you explain that please?

    Do you mean explain that a pound of lean muscle has more calories
    than a pound of fat? In the simple sense of protein being 4
    calories per gram and fat being 9 calories per gram it isn't true.
    To burn 2000 calories worth of fat it's 2000/9 = 222 grams or a
    half pound. To burn 2000 calories worth of muscle it's 2000/4
    = 500 grams or over a pound. Actually, fat includes plenty of
    protein and some fat and fat includes some protein, so the actual
    numbers are a bit closer.

    Do you mean that the body will burn muscle rather than fat in the
    short term? It's an evolutionary issue. Our ancestors saw plenty
    of short term famines and fewer long term ones. To survive a
    famine the body needs to start out by preserving the fat that will
    be needed later in the long famine. Combine this with the fact
    that muscle burns far more fuel than fat and it comes out that
    muscle should be lost faster than muscle in any short term loss
    scenario.

    This is why lean loss happens to anyone who tries to lose too fast.
    It triggers muscle loss not fat loss. If the long term goal is
    to keep it off what is actually lost needs to be fat not muscle.
    Losing fat triggers less rebound and so on.

  18. "Roger Lepine" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Dear experts,

    Here's an interesting question for you.

    Given: a standard 2000 calorie diet.
    Activity: normal office activity, no exercise
    Weight: 200 pounds, male.

    If a person fasts for, 32-36 hours, say from
    Thursday night, until Saturday morning,

    What can the expected weight loss be for the this
    time period?

    Perhaps 10 glasses of water drunk through this
    time period.

    Remembering my high school science, there is
    the law of conservation of mass.

    Applied to eating, this means, that to gain
    10 pounds, you must consume at least 10
    pounds of food and water. Obviously, a lot
    more than 10 pounds, because so much of the
    food and water is converted to energy, waste,
    and evaporated through the skin.

    With this physics, you cannot eat a few ounzes,
    and gain a few pounds.

    Assume all other things being equal.

    I know that diet has become a religious war
    item these days, and I'm not interested in such.

    Please don't bother speculating about long
    term averages, about eating more when you break
    the fast, etc. Or about exercise, red herrings,
    or other variables that are not in the question.

    Please also don't bother talking about
    whether this is adviseable or not.

    Just the answer please.

    Hopefully based on some kind of science or
    experience, not speculation.

    See http://www.kbnj.com/wd.htm for information about the Warrior Diet.
    I follow this approach, and I fast until dinner most days, usually
    drinking only water although sometimes drinking tea or coffee, and once
    in a while having a small amount of a healthy snack such as nuts. The
    research about alternating cycles of over- and under-eating continues to
    grow. A recent animal study, using one day of fasting alternated with
    one day of completely unrestricted eating, showed improvements in both
    leanness and gaining muscle mass.

    It's worth mentioning that, until you get used to not eating for
    relatively long periods of time, your body will just go into what some
    people call "starvation mode" and you will burn fewer calories than you
    usually do. It's quite possible not to lose much weight at all doing
    what you suggest, and to find your weight right back to where you
    started 48 hours after you start eating again.

    -S-
    http://www.kbnj.com

  19. I recently had to have a colonoscopy. It was scheduled for 1:30 p.m. Monday.
    On Sat. I was supposed to eat "low residue" type foods. On Sunday I started
    clear liquid diet (jello and clear soups, soft drinks watered down tea or
    coffee). I used diet jellos, sodas.

    Also had to take Fleets Phospha Soda...

    Same on Monday.

    I lost four pounds. I still have not gained it back and it's been three weeks.

    I had tried everything to lose weight and nothing helped. I'm seriously
    thinking about doing this again - perhaps without the Fleets.

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