Extreme Weight Loss (2022): How Much Weight Can You Lose In A Week?

July 7, 2022 | 3727 Comments


how much weight can you lose in a week without eating

Important note: Please advise your doctor before following any plan. Don’t follow the advice below if you are under 18. 

People always ask: How much weight can you lose in a week?” Well… to answer your question I have good news, awesome news, and bad news.

First onto the good news: YOU CAN LOSE A TON OF WEIGHT IN ONE WEEK

That’s right, you don’t have to be bound to the conventional wisdom of only losing 1 or 2 pounds a week. Extreme weight loss diets can definitely work, but only for a short period of time.

In fact, you can lose up to 15 pounds in one week if you do it correctly.

Now onto the awesome news: ALL THAT WEIGHT YOU LOSE WILL BE WATER AND FAT, NOT MUSCLE

Yup, you read that correctly, if you follow the methods at the end of this post, all the weight you lose during the week will be pure body fat. The conventional statement that losing more than 2 pounds per week leads to muscle, organ, and hair loss is absolute unicorn shit.

How do I know this? Because some awesome scientists from the American College Of Nutrition back in 1999, conducted a study, which tested 2 groups of people for 12 weeks.

One group only did traditional cardio, while the other group only did weight training. Both groups ate 800 calories a day. At the end of the study, both groups lost large amounts of weight, but the one that only did cardio lost large amounts of lean muscle mass, and the one that only did weight training didn’t lose any muscle mass at all.

So there you go, some hard hitting scientific facts that prove that you will not lose muscle during extreme dieting as long as you lift weights.

Note: And if you don’t have a gym membership or if you don’t have access to any weights, then doing a well-designed bodyweight program like Bodyweight Burn is your next best option.

And lastly, the bad news: YOU HAVE TO EAT VERY VERY LOW CALORIES

So yeah…. you have to eat a ridiculously low amount of calories to lose a lot of weight in a week. I’m talking along the lines of 800 calories a day.

The amount that would make any nutritionist hang themselves.

And now, onto the plan, but first, a picture of steaks:

How much weight can you lose in a week protein
I didn’t want to put a boring picture of a scale, so here’s some delicious steaks. I’m guessing this isn’t the best article to put this picture in

The 2-step plan to lose the maximum amount of weight in a week

Please note that the following plan can be used by both men and woman.

And don’t do this plan if you’re under 18, you’re way too young to be eating such low calories.

I guarantee that if you follow the plan below, you will lose 10-15 pounds(water and fat) in one week:

1) For one week only, eat 800 calories per day.

2) Workout 2-3 times per week with weights. Make sure the weights are heavy and be sure to hit all body parts.

That’s all.

Some notes/tips about the above 2 steps:

  • 800 calories is very little food, for any man, woman, or baby walrus. Because of this, I suggest that you only eat 1 meal per day a la Brad Pilon’s Eat Stop Eat. If you eat one 800 calorie meal per day, then you’ll at least feel somewhat satisfied, but if you split that up into 3 or even worse, 6 meals per day, then you’re not going to fare so well on this one week venture. Yes, this means that you will be fasting 24 hours every day for a whole week. Just remember, you will be burning fat, not muscle.
  • Whenever possible, eat higher protein and eat foods with high water content such as fruits and soups. Also, drink lots of coffee and green tea, since they both tend to blunt hunger quite well.
  • Stick with heavy compound exercises when in the gym. That means no curling and crunching, and if you even step foot on a treadmill, my dumbass radar will go off and I may have to kill you.
  • If you can’t lift weights, then your next best option is to do some sort of bodyweight training. You know…exercises like squats, push-ups, lunges, pull-ups, sit-ups, etc..
  • This is a mental game more than anything else. When you’re eating very few calories to lose weight faster, your mind starts playing tricks on you. Your stomach is gonna be grumbling more often. And there are gonna be times where you want nothing more than to self-sabotage yourself. Which is why the next point is so important.
  • Above all, keep yourself distracted and out of the kitchen. If you’re constantly prancing around the kitchen and thinking about food, you’re going to fail. So keep yourself busy. Read a book, play some video games, take a nap, work on your tan, or shave your pubes. I don’t care. Just do something that doesn’t involve food.
  • [EDIT 10/6/2014] I should also add that your protein intake needs to be HIGH. Like really high. In fact, the majority of your calories should probably come from protein, fruits, and veggies if you want this diet to be effective. The protein will help keep you full but more importantly also help maintain muscle.

Remember, this is only for one week

I just wanted remind you all, that this sort of extreme weight loss plan is only a temporary plan.

The results don’t have to be temporary, but the plan is. Please do not try and do this weight loss plan for more than a week.

Doing so is really going to mess with your head and you’ll most likely binge back to your original weight.

After one week, transition to a more moderate weight loss plan for the long haul.

I hope you guys now know how much weight you could lose in a week if went balls to the walls.

Want even better results? Take it to the next level with Fat Loss Boost

Many people have been asking me, “Can I do this for more than 7 days?”

Uh…

Yes and no.

Technically, you could eat 800 cals per day for a sustained period of time.

But sooner or later it’s gonna backfire on you.

If you want a more sustainable rapid fat loss plan…

Then I highly recommend checking out Fat Loss Boost.

This is a more long-term approach than the strategy I outlined in this blog post.

It’s a strategic rapid fat loss diet that works in 14 day cycles.

So you go hard on the diet for 14 days, lose a crap ton of weight, take a break, and repeat.

And the results from Fat Loss Boost are even better:

“I have been able to lose 10 pounds using this program. Starting weight 186. Weight this morning was 176.”

“I lost 12 lbs for my first attempt. Started at 201.7 and ended at 189.9. I am amazed!!! Thanks to everywhere for all the support and great hacks.”

“Ok people I’m done 😀. I hit 171.8 today, my goal was to break 172 on this round which was what I weighed almost ten years ago (lowest as an adult). That’s 30.2 lbs in just under 3 months.

Pretty crazy, right?

Definitely give it a look if you want a realistic, yet challenging plan that burns fat faster than anything. you ever tried before.

Check out Fat Loss Boost

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Questions? Like steak? Let me know down below.

I respond to (almost) every comment, which is pretty crazy considering there’s been over 3000 comments. Sigh…I need a hobby. 

3727 Comments - Leave Your Thoughts

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  1. Hi Keith,
    The part about shaving pubes to distract yourself made me laugh out loud. Going to give it a whirl. Why not? Won’t die from it and I could stand to lose some weight. Thanks again.

  2. Hey Keith,

    Thank you for this great article. I have a few questions though.

    I’m 5’2″ and currently weigh 130 pounds. I was at a happy and healthy 95 pounds till about two years ago when I had to start on anti depressants & put on weight. I’m off to a beach holiday I’m a week and really need a quick pick me up to feel better about myself. On to questions –
    1. Would just a raw fruit veggie diet (once a day, under 800 calories) along with coffee/green tea (no sugar/creamer) be sustainable? I anyway don’t consume sugar, am a vegetarian, & mostly eat healthy.

    2. What is the most extreme form of exercise that you’d approved to actually look okay on a beach?

    Thank you

    1. 1. no
      2. very vague question.
      3. Not my place to say, but being 95 lbs makes you underweight which isn’t something I like supporting.

  3. thank you for article Mr.Keith

    I have question

    1. how can I get flat stomach in 2 weeks
    2. how can I get skinnier thighs in 2 weeks

    Thank you for you time Mr.Keith

    (sorry for bad English)

      1. Hilarious and incredibly smart. In my opinion most “recommendations”, especially for women, do nothing but teach us how to be skinny-fat. Low weight training for fat burning?? Please. Light lifting only teaches your body that you don’t need those muscles, so it may as well use them for fuel. Your insight is refreshing. Only one suggestion, I know most guys don’t do pilates, well, because they’re pilates; but it IS possible to flatten your stomach and thin your thighs (a few inches at least) in 2 weeks on a pilates reformer. I have a horrific bridesmaid’s dress to prove it.

        1. it’s always possible to get “results” in 2 weeks. But i find the results that are possible are never what people actually expect.

      2. LOL omg I laughed so hard at that my abs seriously got a mini workout! you are awesome thank you for all your wonderful advice!

  4. Hi there

    Please can I ask…

    If we go to the gym 3 times in the week but don’t do cardio then how do we loose weight?

    Also how long a session in the gym?

    Warm regards

  5. Hey
    Keith thanks for your article. It is realy help full.
    I am 176 cm and 82 kg am working both 1:30 hour cardio and 1:30 weight lifting but steel i haven’t seen any change on my body.
    Before 2 year i was 52 kg i miss my slime body plz do you have any suggestion for me thanks p

  6. I’m really close to where I need to be weight-wise. 10 more lbs. lost would put me right in the middle of my normal BMI, which is where I want to be. I’m sitting around 800 calories a day, super lean/green veggies only, lifting heavy and I cannot seem to drop anymore weight….not even ounces. Ideas? I’m very driven, so there has been no cheating.

    1. so you’re last 10 lbs? This prob wont work well for you then. Last 10 lbs always takes longer and is never linear.

  7. Hi
    I’m 32 and Wight is 119kg I’m 5ft6in and this is the fattest I have ever been I need to lose Wight will this diet help me? As I tend to bing eat.

  8. I’m 5’8″ and I weigh 250lbs I don’t know where to start in losing weight everytime I try to diet or exercise I just can’t and i give up

    1. start small and aim to improve 1% each day. This might not be the best diet for you to follow if you’ve had trouble staying consistent with stuff in the past.

      1. I can’t lift weights. I’m considered obese despite not looking stereotypically obese, and I have to lose some of the weight before I do any serious exercises. I can only walk for now. I was injured for 2 weeks while jogging for a few minutes.

    2. When I first started trying to get healthy I weighed 190+ pounds at 5′ 2. The first month I gave up sweets (and for me that ment sweet tea as well) that had me drinking water or lemon water. The second month I gave up breads (and stayed off the sweets). The third month I gave pastas. (And still left the other stuff behind. At the start of the forth month I was looking at labels and gave up anything with added sugar. I had such will power because I could see the benefits within the first month. I lost over 70 pounds in 6 months. I was actually able to start exercising after the first month.

  9. Great article, Keith! I’m 157cm and weigh about 85kg. I used to weigh nearly 100 and got down to 78, but I’ve put some of it back on because of craziness in my personal life and now want to kick-start my weightloss. Is it possible to follow your plan on a recurring basis, like once every 4 weeks? Thanks!

  10. If you’re sticking with OMAD / One Meal a Day – and are sticking to the 800 calories in that one meal, what would be your absolutely recommended meal to have….?

  11. Started 6wks ago at 211 and sitting at 175. Drinking at least a gallon of water a day, play roller derby three times a week. Starting with a personal trainer next week & need to lose 5% body fat over the next 6 weeks (currently at 35%). I’m rarely eating, not hungry. Advice appreciated

    1. if you truly are “rarely eating” then there is almost no reason why you shouldn’t be losing weight.

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