Eh Excuse me ah. I will have you know I am aware of why proteins are constantly insisted on being essential (thus me mentioning amino acids) so please refrain from speaking to me like I have not been intelligent enough to have acquired such information.

Your body has LIMITED amounts of Amino acids, and CONSTANT need for. While it can go through brief fasted periods and thrive, after days and days it has to get it somewhere - SEE: Muslim Weight Lifters after fasting month: they always experience a loss in muscle mass due to decreased food intake even with continued training.

If your body has LIMITED amino acids and it NEEDS MORE then the only source it has to leech it from are your muscles! The severity of it depends on several factors such as size of deficit, bodyfat, newbie lifter, etc but the fact remains if you starve the body (Which you will unless you are a 3 foot midget who ISNT weight training) it will take what it can from sources available to them.

And yes I know you mentioned limited but thats still a matter of opinion - you mean 2 days? Have at it. You probably mean 2-3 months though to cut (unless you cut only 1 kg)

By all means, eat 1000 calories and train to maintain your muscle. I conceded that ypou can do whatever the heck you want.

But again I repeat DONT go spouting your nonsense just because it works for your unique body to everyone. It wont work for them.

There was a 2009 study done at Rockefeller University and there are numerous reports from people who have lifted longer than you or I have lifted (or even lived)

http://www.pacifichealthlabs.com/blog/can-...-crash-dieting/

Diets that have smaller daily caloric deficits (300-500 calories) shed fat while preserving lean body mass.

http://www.pacifichealthlabs.com/blog/coul...not-to-do-that/

But in subjects who severely reduced their daily caloric intake, fat represented 48% of the total weight loss and muscle 42%.

https://s3.amazonaws.com/media.nobullbodybu...lose_muscle.pdf

One of the major factors mentioned in the research was the severity of the calorie
deficit: 
“Very aggressive calorie deficits and very low calorie diets tend to erode lean body
mass to a great degree than more conservative deficits.”  

http://www.simplyshredded.com/layne-norton...tting-diet.html

The severity of your calorie deficit will, to a large extent, determine how much muscle you retain/lose.
Short periods of high severity dieting (more than 1000 kcals per day below maintenance level) are not too muscle wasting, but prolonging them for more than a few days will certainly cause one to lose a good deal of muscle.

P/S: GOOGLE GOOGLE GOOGLE

Who is the one posting without proof? Now you post proof of research showing you eat below BMR and lose less than 5-10% LBM Back yourself up if you insist on spreading the word.

So, since I was young... I been bullied because of my size.
It's actually an average size but I still get bullied in school because of that.
Some even hates me for attending/being in school.
And this year, those people who hates me.. accused me for stealing a camera and a phone which I DID NOT STEAL ANYTHING AT ALL.
They told me to pay them some amount of money or else they will spread it around the school.
I did not pay them anything because I am not guilty at all.
At the end, it was spread.
I LOST A LOT OF FRIENDS including my besties.
No one trust me when I told them I din't steal anything.
Everywhere I go, they will be like "Dude.. Dont go near her. She steals stuff" and etc.
No one really talks to me now.
I only lived with my dad, my mom passed away and I am the only child.
My dad sometimes slaps me or hit me for no reason.
Yeah, I was really emo everyday.
Sometimes... I want to commit suicide and ends everything in my life.
But I know there's people out there who is going through a worser day than me.

But it's okay, I started to go church alone nowadays.
I feel better mentally and I'm trying to stay positive on everything that happens to me.
Plus, I will be transfering to a new school on January 2013.
It's like God give me a chance to start a new life again.

New life = New me.
I don't wanna get bullied anymore!

I don't have google research to back me up, considering that I'm freaking lazy and always hated research work. However, what I can share with you is my personal experience.

Here is my credentials :


Left : 97KG (5 months ago)
Right : 78KG (2 months ago

Today (WARNING HALF NAKED PIC! MY BODY AINT PRETTY TO LOOK AT)


I'm currently at 73KG (btw my height 178cm)
I can't tell you if it's good or bad. I would just like to physically show you the outcome you can expect from a pure cardio and extreme calorie deficit diet (on some days I barely hit 1000 calories). Could it be better? Perhaps? The muscles on my shoulder is kinda lacking, so I'm planning to bulk up once I've cut down to 67kg. However, despite having most of the days on calories deficit, I still treat myself (occasionally, twice a week) to nice meals with my families, attending mamak, drinking, wedding and birthday parties. There's only 2-3 heavy meals a week won't hurt, just watch out your meals on other days when you're more in control of what you eat.

Did I lose a lot of muscle? Did the muscle loss from extreme deficit affected me greatly? I won't know. What I can tell now is that currently, I'm SIGNIFICANTLY feel much better on my daily activities. 97KG time I used to dread even a short walk from my office to the toilet. Nowdays, I don't even mind taking a 2km walk back to my house from the LRT station (always do this when the traffic was so bad that I'm walking faster than the cars on the road). My body feels great and I hardly feel tired even walking up 5 stories to my office floor, and buying clothes is great nowdays.

I have showed you the method and result based on my experience. I'm not here to tell you what's right or wrong. It's up to you to decide what you want to do.

Oh finally I would like to stress this out : LISTEN TO YOUR BODY! (although I would like you to resist the evil temptations from your stomach, unless it starts to hurt)