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

=================

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. this is easiest to do if you go low carb and focus on eating low starch vegetables, protein and very little dairy and fruit and multi vitamins This allows your body to use fat as its main source of fuel and stops screaming for carbs. it usually takes about three days for the body to switch over.

    some pre packed meal replacements replicate this. Eg Optifast.

    i have dropped 33 pounds over 3 months and have maintained my muscle mass.

  2. I realy lov this advice. In 2 weeks have wedding to go to am lik 85kg .My weight for my hight is 65kg.
    Wana lose 10kg in 2 weekz then slowley lose it after 2 weeks is my plan.
    Am now 2nd day in to my 800 calori plan.

    My plan now is im working 9 hours ,my job has lotz off walking which is good,
    When i wake up i drink water then 3 hour later in my work i have 1 scoop off diet fuel which is 100 calories and has 14g protin in it.
    Then 3 hour later i have another protin drink which is another 100 calories,
    Then when get home i eat one fish and lots veg ,am sure it be under 600 clories .
    After eating this its more easy to sleep. Because its hard to slep if ur bely iz empty.

    Also have a home bench so doing weghts 2 times , if feel energised wil do 3 times week, when am doing weghts work out i sip on bcca drinks so i dnt feel weak or lose lose mucles.
    Thanks for this tip it realy helped me go for it.
    Meny thanks wil update end off week.

    1. Already doing IF, so this is even more challenging/exciting, especially since I just spent a week with my parents in TX eating nothing but Mexican food. Do you know of a calorie app? There are so many it is confusing. Thanks! MM

  3. I think I may have gotten a bit overboard, today (by 100 calories, I estimate)…wasn’t sure how much that dish of lentils was.
    If I did go overboard, is there something I can do to “make up for it”? Or should I just let it go?

    Sorry for the dumb question, lol.

    1. If u went over u can do 10min more on weghts that sud cover ur extra 100 calores. If that makes u feel better lol.

      1. Yeah, I’ve been doing a bit of fasted workouts. That way, I can try and maximize fatloss. Like Keith recommended, I’ve also been trying to “save” my calories so I can eat one big meal at night so I can feel satisfied.

  4. i tried this but only got to the 2nd day.. should/can i try this again sometime later and go with eat Eat Stop eat? or did i just crap all over my progress?

    1. sorry, meant to say i got 4 days and almost through the 5th but ended up overeating yesterday and today…(by like 800 calories over my maintance, both days)

      im determined to keep it going and not give up..just fell with a problem and ate out of moodiness

  5. One more question. I do IF via Lean Gains. I fast 8PM-12PM & work out in the early am. I take the recommended BCAA more or less. Do i need to account for this in my caloric intake. Thanks!

  6. I eat a plant-based diet. Will this work for me? Protein shake and 1 meal with legumes and veggies as long as the calories for the day don’t go over 800. Or should I stick with the protein shakes and no legumes?

    1. I started this diet and I get really bad low blood sugar, so in the morning I have a low calorie breakfast, these awesome chia seed snacks or some almonds. Helps me work out harder without taking much from my 800 calorie limit.

  7. What’s “high” protein? Like how many grams in the 800 calories? Also you say lift weights but how heavy would you recommend?

    And why no cardio? Will it be better if we do cardio on the days when were not doing weights?

    Sorry for all the questions! Thanks

    1. That would prob be around 80+ grams of protein per day or 4 scoops of protein powder.

      No cardio because when you’re that low on calories, extra cardio just isn’t needed.

  8. I would be intrested in trying this to get my body back on track. I’m used to doing hours of cardio to lose weight it’s tiresome and tedious and long term hard to maintain. So to read that I could lose alot of weight in 2 weeks just by just doing weights and watching my diet, gives me abit if hope:)

  9. I find it much easier to just not eat at all. So I am not going to be eating anything at all for a week and I will be drinking excessive amounts of water (180 oz.) every day. Will cardio be effective or should I only stick to the weights?
    Thanks so much!

  10. Hey Keith,
    I know you said not to do this for more than one week but I’ll be fasting about 18 hours a day for the next month for a religious holiday. Since I’ll be fasting it’ll be pretty easy to keep my caloric intake at 800 calories for month. Do you think It would be okay to do it for a month in my situation?

    If so, how many lbs do you think I’d be able to lose in a month?

    I’m 22, 5’0 and 140lbs.

    Thanks a bunch!

  11. I’m doing this for 1 week and already like the results. Question though: How do we taper back up to a normal or sustainable caloric intake level?

    My goal is to preserve mass but to also have enough energy to start working in cardio (runs) 3-4 times a week. Should calories jump to 1500-1800 per day with the majority of those coming from protein?

    Awesome site!

    Hooah!

      1. Hi Keith!
        When you say where you are losing about a 1lb a week… what does that mean for a woman generally? Mind you, I am going from a high alcohol lifestyle (not now thanks to you and this diet) and terrible starving, drinking, binging lifestyle courtesy of fat fasting and keto. OK lie, courtesy of my addictive, OCD, eating-disorder self. 🙂 EIther way, this is only day 2 I am already FULL of energy, not craving alcohol, losing weight and planning when my 7 days are up to start running again in between training. 🙂 The question is, what is a healthy calorie intake if I am doing weights 3x week and running 2-3x? I’m a 44 year old female, I guess about 30 lbs or so overweight. Can’t be sure as I only measure by my clothes — do not go near scales and never have. 🙂 Thanks for all you do, very excited I found you and your site!

  12. How long should I be lifting weights each week? I am 5’5″ and 152 lbs…ugh! If I follow your plan and lose weight, after 1 week what should I “up” my calories to? Also…should I be doing crunches or something to help shed the tire around my waist?
    Thank you!

    1. 3-4 times per week.

      Up your calories to the point that you’re losing about 1 pound per week, so multiply your bodyweight at that point by 12 to get your daily calorie intake.

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