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Op donderdag 22 december 2011 10:33 schreef wimjongil het volgende:[..]
Uit de duim gezogen, onderbuikgevoel, you name it. Maar jij zou dus alles geloven wat een of andere FOK!er zegt over een gebied waar hij/zij zogenaamd verstand van heeft? Ik neem zulke dingen pas aan als ze hard gemaakt kunnen worden.
Nee dat doe ik zeker niet. Maar wel als ik weet dat hij of zij gewoon gelijk heeft. Goed, niet iedereen weet alles. Maar om dan direct een boek wat ik andraag om te lezen te betitellen als sprookjesboek terwijl jijzelf er blijkbaar 0,0% verstand van hebt is gewoon een beetje dom.
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Mijn vragen wat betreft wetenschappelijke onderbouwing dat het slecht voor je is, naast de nadelen reeds in de OP genoemd.
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The Starvation Response
You can survive for months without food. You’ve probably heard stories about
people getting lost in the mountains or wilderness for months with no food at all (only
water), or being confined in a prisoner of war camp for years with only tiny amounts of
food. What makes surviving under these conditions possible is your body’s remarkable
ability to slow down its rate of calorie burning.
When your body senses calorie deprivation it says to itself, “It looks like this is all
the food we’re going to be getting for a while, so we’d better stop burning so many
calories and start saving our energy. This way we’ll be able to survive longer on the little
amount of food we have.”
The starvation response developed largely from exposure to adverse
environmental conditions like droughts, natural disasters and food shortages.
Furthermore, there were no supermarkets ten thousand years ago - if people wanted to eat,
they had to either grow their food or kill it. It’s likely that at times, ancient man didn’t
know when the next meal was coming and may have only eaten once or twice a week.
The starvation response evolved in humans to ensure the survival of the species.
Your body can’t tell the difference between dieting and starvation
This wonderful feature of human evolution is a blessing if you’re stranded out in
the wilderness with no food. During periods of starvation, the body slowly begins to feed
off itself, burning fat stores, muscle and even internal organs for energy. If you continued
to burn calories at your normal rate, your limited reserves of stored energy would be
exhausted quickly and you would die very soon after you food supply was cut off. The
starvation response keeps you alive longer.
Unfortunately, this same life-preserving mechanism can work against you when
you’re trying to lose weight because your body can’t tell the difference between dieting
and starvation!
Severe calorie cutting always sends your body into “starvation mode.” There’s
nothing you can
7 Reasons why you should stay away from very low calorie diets.
The consequences of low calorie dieting are automatic and unavoidable. The
responses are metabolic, hormonal, and psychological in nature, and include: Decreased
metabolism, loss of muscle, increased activity of fat-storing enzymes and hormones,
decreased activity of fat-burning enzymes and hormones, decreased thyroid output,
increased appetite, increased chance of regaining weight, and decreased energy and work
capacity. Let’s take a quick look at each.
1. Very low calorie diets slow down your metabolic rate
The first thing that occurs during a severe calorie shortage is a decrease in your
metabolic rate. The lower your calories, the slower your metabolism becomes. Simply
put; when you eat less, your body burns less. When you eat more, your body burns more.
In the book, “Everything you need to know about fat loss,” Bodybuilding
nutritionist Chris Aceto uses a great analogy to describe the way this mechanism works:
He wrote, “If you’re earning $4000 a month, but your boss suddenly cuts your pay to
$2500 a month, you will try to live the same lifestyle on $2500 a month as you did on
$4000 a month. After a while, you have to adjust and save money, and change your
lifestyle. The same is true with a calorie intake that is simply too low. When calories are
cut below basal metabolic needs, the body will accommodate and slow its metabolism, so
it becomes difficult to lose fat even on low calories.”
This metabolic slowdown is well documented. When calories are restricted, your
metabolism decreases by at least 20-30%. With severe calorie restriction, some studies
have shown that resting metabolism can become depressed by as much as 45%! That’s
the equivalent of having your daily energy expenditure drop from 3000 calories per day to
only 1650 calories per day! This is why, after prolonged low calorie dieting, you can eat
very little food and still not lose weight. This also explains why it is so difficult to lose
those last 10 or 20 pounds.
2. Very low calorie diets make you lose muscle
The most devastating effect of the low calorie diet is the loss of muscle tissue.
Once the starvation alarm is triggered, your body begins looking for ways to conserve
energy. Muscle is metabolically active tissue. Getting rid of it is the body’s way of
decreasing energy expenditure. It’s easy for your body to use muscle for energy. This
process is known Gluconeogenesis – converting muscle into glucose. This includes
skeletal muscles, and internal organs, even your heart muscle!
Study after study has shown that very low calorie diets without exercise will
always cause 40 - 50% of the weight loss to come from lean tissue. Many diets, especially
those that are low in carbohydrates, cause large losses in water weight. Between the loss
of water, glycogen and muscle, fully 75% of the weight you lose on such plans is not fat!
The initial weight loss on most diets is very deceiving, giving you only the illusion of
success. Even with exercise, if a diet is too restrictive, much of the weight loss will still
be lean tissue.
3. Very low calorie diets increase activity of fat-storing enzymes and decrease the
activity of fat burning enzymes
The chief fat storing enzyme is called Lipoprotein Lipase (LPL). When you drop
your calories too low, your body will produce more LPL and less fat burning enzymes. In
other words, when you don’t eat enough, your body changes its chemistry to make it
easier to store fat in the future.
4. Very low calorie diets decrease output of thyroid hormone.
The Thyroid gland is largely responsible for the regulation of your basal metabolic
rate (the rate at which you burn calories at rest). When your body senses a severe
reduction in calories, there is a corresponding reduction in the output of active thyroid
hormone (T3). The result is a decrease in your metabolic rate and fewer calories burned.
5. Very Low calorie dieting increases the chance of rebound weight gain
Almost everyone loses weight initially on a very low calorie diet, but it never
takes long before the body catches on and starts conserving energy. That’s when you hit a
plateau. Once you hit the plateau, it becomes much harder to keep losing weight even if
your calories are extremely low.
This lack of continued results, combined with gnawing hunger pangs and
insatiable craving, usually causes people to give up out of sheer frustration. They go off
their diet, the weight creeps back on and their body fat ends up back where they started -
only now they have less muscle and a slower metabolism.
With a slower metabolism, what used to be a maintenance level now becomes a
surplus, and the weight comes right back on. Most people gain back all the weight they
lost– and some gain back even more, leaving them fatter than when they started. This up
and down pattern of weight loss and weight re-gain is commonly known as the “yo-yo
cycle”, and it often continues for years or even for an entire lifetime.
With each repeated bout of dieting, your metabolism becomes less and less
efficient and you can actually become progressively fatter while eating less food.
6. Very low calorie diets increase appetite and cravings.
When your body goes into starvation mode, this triggers increased appetite and
cravings in an attempt to get you to eat more food. The hunger and cravings can be so
strong that you become ravenous. It’s virtually impossible stay on a diet when you are
voraciously hungry and all you can think about is food. Few people have that much
willpower.
7. Very low calorie diets decrease your energy and work capacity
Low calorie diets leave you tired, lethargic and unable to sustain high levels of
activity or intense workouts. Dr. Lawrence Lamb, author of “The Weighting Game: The
truth about weight control” points out that “The first sign of under nutrition is the loss of
energy and the inability to sustain prolonged physical work. There is a direct relationship
between calories consumed and the physical work a person can do.”
If you have no energy to work out, you’re going to feel lousy and seriously
compromise your results. The ability to train hard aerobically and with weights is critical
for your long-term success at fat loss.
quote:
"Dieting is not effective in controlling weight. You can get a temporary weight loss
with a diet, but each scheme ultimately gives way to weight gain, and subsequent losses
become increasingly difficult. Worst of all, you get progressively fatter on less food.
Dieting actually makes you fatter!”
-Dr. Lawrence Lamb, Author of "The Weighting Game: The truth about weight control.”
"Cutting calories backfires. The more you cut, the more your body fights to hold onto
its fat stores as reducing calories signals the “starvation response” where the body tries
to “survive” and hold onto its calorie reservoir known as fat.”
- Chris Aceto, author of “Everything you need to know about fat loss.”
Knapen die storneren willen moeten mannen met automatische incasso's zijn