I thought this was well-covered in the fitblr community, but since I keep seeing posts about this, and I’ve seen people give advice that makes that seem okay, I’m going to try to explain why it’s not. I’ve made this mistake before. I wish people would do a bit more research about what they are doing to their body before they do it, I know I should have.
Why can’t you? Because it is not safe. You need your NET calories to be at least 1200. Net calories are the calories your body actually uses. So, say you eat 1200 and burn 600, you need to eat 600 more to compensate. If your net calories is regularly under 1200, your body will go into starvation mode.
What is starvation mode? Starvation mode is what happens when your body is not getting the minimum amount of calories (1200 is the general rule). Your body will eventually stop dealing with food the way it should. This won’t happen in one day, or even two. But if you make eating less food a habit, you can bet on it. Your body will start to try to protect itself by slowing your metabolism progressively. Also- instead of losing fat, your body will try to store any fat you may take in. Any weight loss you lose on a diet like this will be muscle loss, NOT fat loss. And if you aren’t aware, the more muscle you have- the more efficient your body is at burning fat.
So, if you want to feel sluggish, lose muscle, get weak, store fat, and be over-all unhealthy: keep up what you’re doing.
If you want to lose weight HEALTHILY and effectively, boost your metabolism, and feel better overall: EAT, and eat enough. I know a lot of people have this fear of food that they think intake = fat gain, but that mindset really needs to change.
Think about it like this:
If you fill up your gas tank half-way for a trip that requires a full tank, what would happen?
Your car would use all the fuel, run on empty for a little while, then break down.