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. Hello,

    I’m a busy mom and usually am only able to workout after 9pm when the kids are in bed.
    When would you suggest is a good time of the day to have my 800cal mean?

    Thanks

  2. Ha. Awesome article. My fiancé is a massive bread monkey/junk food ninja. I got 6 kg to shed in three weeks. Will give this a go for a week.

    Thanks Keith

  3. Had a c section 6months ago I weigh 170pounds I have been eating a diet consisting of 700cals the last 6 days and power walking 5 miles a day, plus squats, and other work outs such as situps I aim for 110 twice a day? So my question is how much weight do you think I will loose if i keep up until February I’m a small frame just want my tummy gone hips and everything else is OK

  4. Hey,

    So I am 5’10, my weight usually goes straight to my mid section and breasts and I have to take a medicine that makes it hard to lose weight. I was following a similar plan like the one you posted, and it worked for the few days i did it. I ended up going to a party and that messed everything up. SO…with a 178 lb and 5’10 body…what would you recommend as for how often and for how long I should work out a day? I work and go to school, but I’m really tired of not feeling and looking the way I want. Now that I have tried out the diet part and have seen it start to work, what would you say my activity level should be? I’m excited that you said weight training is better! I love cardio but I love weights more lol Then I feel like i actually made some real effort.

    Sorry for the rambling! Thank you!

    1. Length of your workout is relative to what you do.

      You could do 3 full body workouts per week which could take about an hour per workout.

  5. Keith, In most places it says that there are 7700 calories to a kilo. If I normally eat 2400 calories/day, 800 calories would mean a 1600 calory/day deficit or 11200/week => ca 1.5 kg. In the beginning of your article you claim that a 15 pound=6.8 kilo weight loss is possible, I’m just curious as to how that works with that diet. Are the extra pounds lost due to the intermittent fasting and the weight lifting?

  6. I inveted this method for myself using my experiments before I red this. I call it: one a day is enough for half of global population, does it to me too!
    I drink coffee in the morning and evening and one normal lunch.
    For the question of deficit I’d say Your body has an idle too do not think if you swallow 2000 kcal. You are going to eliminate all of it.
    Just for add something az a physician, after 7 day of starving the body’s enzime production will adapt, will digest your body less.

  7. I’ve currently been doing something similar but hadn’t been using 800 calories as a target. Just fasting all day (except my post-workout protein) and eating dinner at night. Two questions….

    1….post-workout (11am) protein shake (made with water)….should I cut this out totally then while doing this plan?

    2….I’ve been drinking a gallon of water a day. Should I reduce or increase this?

    1. 1 – no you still need protein to preserve muscle
      2- Uh why are you drinking that amount? Nothing particularly wrong, but drinking that much water isn’t going to anything magical.

  8. I’m already doing something similar….fasting all day with the exception of my post-workout protein shake at 11am. And I didn’t have the magic number of 800 for a target 🙂

    First question….should I cut out the post-workout protein altogether? I do take casein at night after dinner but that will easily fit into the 800 calorie allowance.

    Second question…..I currently drink a gallon of water a day. Is that okay on your plan or should I reduce it down?

    Thank you!!

  9. Hi Keith,

    I am a 34 yr old with three kids. I embarked upon a self imposed weight loss program about 4 months ago and lost 20 lbs thus far however, our carnival is on Feb 11 and 12 and I am playing mas. I will certainly try this and let you guys know how it works out.

    Thanks for the plan.

    Best
    Candy

  10. I would love to try this but I have a question,
    I gave birth to my daughter 10/20/2015 naturally with no complications, my energy has increased and I feel great! Would you recommend this diet for me? And do you think it’s possible for me to lose more than 15 lbs since this extra weight is fresh (I wasn’t overweight before I got pregnant and I was very active running 6 miles a day… I’m not nearly as active now….

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