Is it possible?

Losing weight in a week is definitely possible, you just have to be realistic about the actual amount of weight that you can lose, and that is safe to lose.

If you do some quick research online about losing weight in a week quickly, you'll run into a lot of articles that will tell you that your weekly weight loss should be capped at around 1-2lbs. This is because anything more will increase the chances of you losing not just fat but muscle tissue as well. This isn't a hard and fast rule of course. People who have more fat to lose can normally lose much more fat safely than just 2lbs safely. But the number decreases as they become leaner.

There's this whole obsession over weight loss and counting the pounds on our scales at home when this is actually a rather crude way to measure fat loss. It's convenient, but it's not accurate.

But who cares if it's fat or muscle, isn't it all well and good as long as you lose weight?

No it's not all good if you lose muscle weight, and YOU should care. Continue reading and you'll learn why.

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Weight Loss is not the same as Fat Lose

When you check your weighing scales at home and you notice that you've lost weight, it doesn't always mean that you've lost fat. It could be that you just lost some water weight or that the last time you measured you were full (just ate) and now you're not. It could also mean that you've lost some muscle tissue because your body went into starvation mode due to some crash diet that you're doing. This last one is what should concern you the most.

Losing weight in a week is possible but it has to be done right. That's why you need to keep it within 1-2lbs because that's sort of like the safe zone. If you keep within that range, chances are most of the weight you'll lose will be fat. Again, this is just a general estimation but the "safe zone" is around that range.

Why is it so important to make a distinction between weight loss and fat lose?

We lose weight by creating a calorie deficit. So if you want to lose weight, you have to either boost your calorie consumption through exercise or lower your calorie intake by dieting. The deficit forces our body to burn fat (and muscle if the deficit is too great) and once enough is burned, the weight loss is reflected in our weighing scales. We lose fat (or muscle) mass so naturally, our body weight goes down.

But it's important to note that when overdone, this deficit creation can force our body into starvation mode. When this happens we start to convert muscle tissue into energy along with fat. This is very bad for long term weight loss and over all personal health.

Muscle tissue is important because it burns calories at rest. So the more muscle tissue you have, the higher your daily calorie consumption is.This is why body builders and athletes can eat a lot and not get fat. More muscle mass means greater metabolism.

So now I hope you can understand why losing muscle tissue can hurt you. You should also now understand why it's important to limit weight loss to only fat loss.

Here's a nice explanation on the difference between Weight Loss and Fat Loss

So again, losing weight in a week is very possible and isn't actually overly difficult to do. You just have to make sure that you're not overdoing it.