You dickhead.

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)

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

not applicable to fasting.

  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.

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.

  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.

   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

You will probably lose a few pounds from dehydration.  You could
possibly lose a little under one pound of fat.  To lose one pound of
fat, you must burn 3500 calories more than you consume.  If you
normally maintain your weight on 2000 calories a day, a 1.5 day fast
would give you a 3000 calorie deficit -- not quite one pound's worth.
Anything else you see on the scale is water loss, to be quickly
regained.

So many factors go into determining exactly what one will weigh at a
given moment that whatever you see on the scale after a short fast
won't be statistically significant anyway.

Chris
262/143/ (145-150)

I am a 172 lbs man. When I fast for 36 hours, drinking all water I
want, I lose 3 lbs. In the next few days, abount 2.3 of those pounds
come back. If I eat more, all 3 lost pounds come back. About 0.6 lbs
is the actual fat loss, the rest if transient effects.

i

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

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

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