Quick, if you told anyone that you were fasting to lose weight, they would probably think:
a) You’re crazy
or
b) You’re crazy
It’s sad, but anytime you tell someone that you’re fasting, the only acceptable reasons for doing so are for medical or religious reasons. If you even mention the words “weight loss” and “fasting” in the sentence, then you’re in for a world of hurt.
But in my opinion, fasting for the sake of weight loss isn’t crazy. Not at all.
In fact, strategically fasting everyday for 16 or even 24 hours can provide a whole host of benefits over the conventional “eat breakfast and 6 meals per day” saying.

Basics of intermittent fasting
So what exactly is intermittent fasting (IF)?
Simply put, IF is the act alternating periods of fasting (not eating) and eating. While there is no official IF program, most programs range from 12-24 hours of fasting.
So why is Intermittent Fasting awesome?
Well lets see:
- You get to eat bigger meals
- You get more work done since you’re not eating as often
- You have more energy since you’re not bogged down by food
- You get to stick your middle finger at every single fitness guru who says eating every 2-3 hours is absolutely necessary for good health
I could go on and on.
Is IF unsafe?
In short, IF is safe.
However, just like everything else in life, if you overdo it and take it to the extreme, then it will become dangerous. If an intermittent fasting program tells you to fast for 16 hours, you shouldn’t disregard that and decide to fast for 100 hours.
As long as you don’t do anything crazy like that, then there’s really nothing dangerous about IF.
But won’t fasting make me fat?
I never really saw the logic in this statement, but since when the hell did not eating make you fat?
But anyways, many people have this ludicrous belief that fasting will make them fat. This belief originates from mainstream media where they constantly promote the fallacy that fasting will force your body hold onto its body fat and make it burn muscle instead which is just incredibly stupid.
Will IF make me lose muscle mass?
When it comes to fasting, another popular myth that people believe is that fasting will make you lose all your hard earned muscle mass. This is simply not true and as long as you perform of heavy resistance training 2-3 times per week, then you shouldn’t fear about losing any muscle mass.
If you need further proof, check out this research study. In it, scientists showed that even when people ate a super low calorie diet (800 calories per day), they were able to maintain all their muscle by lifting weights. The reason behind this is because the act of lifting weights sends a signal to your brain that you want to preserve all your muscle mass.
But don’t you need to eat more often to have more energy?
This is exactly what food companies thrive off of. They create all these products that target people who need a “quick energy boost” or a quick afternoon “pick me up”.
But in reality, these people probably don’t even need these products. They buy them because they fear that they’re suddenly going to crash and burn when in reality nothing is really going to happen.
If you just give your body a chance to experience what it’s like be without food every 2-3 hours you’ll realize that you’ll actually have more energy than ever.
Just give it a shot.
IF is just another way to eat
Even though I love IF and would NEVER go back to eating 6 times per day again, I have to admit, it’s just another tool. It’s another tool to help you lose/maintain weight.
Unlike most fitness professionals, I’m not going to tell you that it’s 100% necessary to do something. I’m not going to tell you that it’s absolutely mandatory to do IF because honestly, it’s not for everyone.
Some people just love to eat small meals every 2-3 hours, and if you’re one of those people, then that’s cool. I’m not gonna judge you.
But if intermittent fasting sounds good to you, then check out the 3 most popular IF programs below.
A look at various IF programs
Over the past couple of years, more and more fasting programs have come into the market. IF is slowly growing in popularity, but here are the 3 most popular forms of IF:
1) Eat Stop Eat
Eat Stop Eat was created by Brad Pilon is now arguably the most well known form of intermittent fasting. I’ve been using this program for the past 3 years, and if you read my blog often then you know that I absolutely love this program.

Eat Stop Eat requires you to fast for 24 hours (e.g. 7pm on Sunday till 7pm on Monday) 1-2 times per week. On the other 5-6 days of the week, your main goal is to simply eat normal (maintenance calories).
The whole goal of fasting 1-2 times per week is to let those days create a calorie deficit of 10-15%.
Important Eat Stop Eat notes:
- Even though you’re fasting for an entire 24 hours, this doesn’t mean you get a free pass to the all you can eat buffet. The main goal is to simply eat normal after each fast. Don’t over or under compensate for anything.
- Despite fasting for 24 hours, you still get to eat every single day. So for example, if you start a fast on Wednesday night and end it on Thursday night, that means you get to eat a meal on Thursday night. Awesome, huh?
- Eat Stop Eat is more of a lifestyle change than an actual diet since you’re only eating less for 1-2 days of the week.
You can red my review of Eat Stop Eat here.
2) Leangains

And now we have Leangains created by the oh so famous Martin Berkhan (seen above).
But unlike Eat Stop Eat, Leangains has a much larger focus on pre/post workout nutrition and macronutrients.
With Leangains, you’re fasting every single day. Men will fast for 16 hours and women will fast for 14 hours.
While many people have effectively used Leangains to lose weight, many people have also used it to effectively pack on muscle mass. But not only is this muscle mass, it’s lean muscle, meaning minimal fat gains hence the term “Lean” gains. This is achieved though calorie and macronutrient cycling. If you’re ever looking for a program that lets you pack on muscle with minimal amounts of fat, then this one’s for you.
There are a couple different variations on Leangains, but all every one has you taking 10 grams BCAA before workouts.
I don’t want to delve into the rest of the details but if you’re interested in the rest of the Leangains protocol you can read the Leangains guide here.
3) Warrior Diet

And lastly, we have the Warrior Diet created by Ori Hofmekler.
This form of fasting to lose weight isn’t as popular as the first two, but it was the first form of IF I tried and till this day, I still use it from time to time.
The Warrior Diet has you fasting for 20-24 hours every single day, so it’s similar to Eat Stop Eat in terms of the fasting length.
During your fasts you can still drink water and zero calorie drinks like tea, coffee, and diet soda.
But the main difference here is that you’re eating all your calories in 1 massive meal per day. The mainstream media will probably never promote this way of eating, but hey, it works.
I’ve done it in the past, and you really don’t feel hungry while fasting. Plus, every day is like a mini feast since you get to eat a crap ton of calories in one sitting.
4) Honorable mentions
Some other great intermittent fasting programs include:
- Intermittent Feast By Nate Miyaki
- Fast 5
So which program is best?
Whew, all this fasting talk has gotten me a little hot. And hopefully I’ve gotten you a little bit excited too, maybe even got your nipples hard.
But if you had to choose, which of the above 3 is the best intermittent fasting program.
Well… I don’t know.
It’s really a personal preference. I’m not going say that Eat Stop Eat is the absolute best IF program out there because it’s not. It’s one of the best, but it’s not the absolute best.
Some people don’t like to fast for 24 hours and that’s fine. In that case, you should try something more along the lines of Leangains.
And if someone likes to come home from work every day and just stuff their face with food, then the Warrior Diet is probably best for them.
In the end it all comes down to choosing a program that fits your lifestyle.
Fasting to lose weight = not crazy
Seriously guys, fasting is not as crazy as you think. You’re simply waiting longer between meals.
But to be able to effectively use intermittent fasting, you need to have an open mind.
You need to be able to let everything that you thought you knew about nutrition and dieting behind and be able to step into this new world of “not eating”.
But trust me, once you starting fasting, you’ll never want to go back.
Have you ever tried fasting to lose weight? Did you like it? Let me know in the comments below.
Hey there, I’ve just finished a week on an IF diet I saw on a Horizon programme here in the UK, it’s called the 5:2 diet and seems most similar to Eat, Stop, Eat. I had one non-fast day where I ate a bit more than maintenance calories, and have still gained 1lb this week. I work out x5 a week (x2 cardio, x3 weights) which is the same as normal. Any ideas why this happened? I would have thought that if I’m pretty much not eating for two days a week I could afford to slightly over-indulge one day but maybe not? I’m 5″4′ 123lbs.
Hard to say exactly, but mostly likely it’s just fluctuations in water weight. I wouldn’t worry about it, the scale can play evil mind tricks.
I just started on the leangains method yesterday. It is not exactly the same in the sense I am not taking BCAA before workouts (4 x a week weight training).
My Fiancee is dead against me doing this, she thinks it is a dangerous fad and will not even entertain the idea of reading any of the articles I have pointed her to, even though so many people are getting amazing results.
My whole motivation is my wedding at the end of October so i want to trim down fast, and have lost 5lbs from normal calorie deficit and exercise but have been reading about IF for a few weeks now and really want to give it a go to lose fat and keep / gain muscle mass.
Yesterday was fairly easy, and I was amazed how energised i was at the gym training fasted,I got a little cranky in the afternoon, and this morning is feeling a little harder. I’m hoping to do the whole week, but not sure how I’ll be able to miss breakfast at the weekend without the missus noticing…………..
I am not following leangains exactly. I am fasting in the morning just drinking black coffee to keep my mind off it, training at 12:30ish, (mon – Fri, no BCAA), when I get back I eat all my lunch and morning snacks in one go with a protein shake (which I found yesterday was actually quite difficult to get it all in……. ). I’ll then have an afternoon snack, back home for tea and a snack in the evening. yesterday I managed to eat 1300 calories (I’m currently 177 lbs 5’6″ male age 35). My goal for losing weight is around 1500 calories with my maintenance about 2400. I also trained at the gym so my NET calories were about 1100
I was amazed to find how difficult it was to even get that 1300 calories in, I even found I was having to carry on eating when I wasn’t even hungry. My main concern though is that the above is great news for weight loss, but even though a high portion of my calories were protein and I went to the gym and did some weight training, is this calorie deficit going to mean I will lose weight in muscle mass? I know that its pretty much a myth that you lose muscle that easily, but I think I may have taken it to the extreme yesterday so I am a little worried. I am not that concerned with gaining too much muscle, I just don’t want to lose what I have and get ripped (for the first time in my life).
The other question I have other than that is, what can I do to get my missus to see that IF is a valid way of life and not a dangerous fad or, as she put it, an “eating disorder” (lol….)
Daz C
@Daz,
Congrats on the wedding!
As long as you’re not losing strength in the gym, you won’t lose muscle mass. And even if you do, you’ll very quickly regain it back once your resume normal eating. So just keep on with the deficit and try not to use it as an excuse to eat more calories (this is where most people screw up.)
As for the wife…it’s difficult. IF isn’t widely accepted in the mainstream yet. So you can either: show her the research, have her watch that BBC documentary on fasting, have her read Eat Stop Eat, or wait for Dr. Oz to mention it 🙂
Great post. I have already been doing intermittent fasting and it is working great for me. I have been using the Renegade Diet. What is your favorite version of fasting?
I do a combo of ESE, Leangains, and warrior. Some days, I’ll eat 1 meal per day, some days 2-3. Depends on how I’m feeling and my schedule.
Hi I am 57 an need too loose allot of weight. This IF looks interesting. I want to increase energy levels. I have gained a lot of weight in the past couple of years.I need to loose at least 80 lbs.Pills ,surgeries do not appeal to me and do not work.I would like to keep off the weight if I can loose it. Do you think there is an IF program for older folks like me?
Or should I be looking for something else?
There is no specific IF program for older individuals, any of the ones I outlined here will work regardless of age.
Hey, I’ve tried IF and found it to be useful but I ended up fainting when I tried to exercise on an empty stomach. Furthermore, due to IF my insomnia worsened and I couldn’t sleep for 2 days. Apparently it works well for men but not women, can you expand on this? Also I’m doing p90x so I’m not sure if I could work it into my schedule at all.
Well IF isn’t for everybody. If you’re really having trouble then try eating something light before your workout or try some coffee.
i have been intermiting fasting for over 2 months i did lose wight in the begeining i could see changes a bit in my abdominal it stoped for quit while i started counting my colories still wasnt losing no weight and am still not losing weight someone told to lower my carbs 50 grams to se if i can lose weight or nt
Lowering your calories should be your #1 goal. When you first start losing weight the results will come quick at first because you lose a lot of water weight but over time weight loss will appear to slow down and results won’t come as fast. Just be consistent.
i typically eat around 1300 calories/day. lets say i started a 24 hour fast on wednesday at 6pm. would it make sense for me to eat a decent meal right before the start, and then eat a huge/high calorie 1000-1500 calorie meal on thursday at dinner? or would that negate the point?
basically if you’re only fasting for a 24 hour period (wed at 6pm to thurs at 6pm lets say) should you still eat your calories for both wednesday and thursday while not fasting?
I’m not exactly sure what you mean…depends if you’re doing ESE or WD.
It doesn’t matter when or what you eat before you start the fast.
Basically after the fast is over, you simply eat your calories for that day only.
I’m a 5″2 female, who is only 14 years old. I need to lose some weight, in order to be healthy, but vanity is not my main target, fitness is. I want the ability to be great at lots of exercises. I do p90x. I’ve been looking at this, and i’m wondering whether it would be good to fast from 8 P.M, until 4 P.M the next day, and eat during that 4 hour window. I will also be exercising during that time though, althouhg i can’t exercise on an empty stomach, it makes me feel faint. I’m also doing it for better memory. Do you think the benefits would be the same for someone of my age? It is actually easier to eat in this way. Plus, is the weight loss to do with a calorie deficent? Also, i imagine that you would still need to eat a lot during your 4 hour window. I plan to eat 1300 calories a ay, so i would eat that in the 4 hour window, right? Thanks.
Please if you’re 14 DO NOT DO THIS DIET. You’re way too young to be doing this sort of dieting. Just aim to eat healthier, exercise more (even p90x might be overkill) and the weight will come off naturally.
I’m 17 years old, 5’5″ male, and i want to get ripped, I go to gym 3 times per week, I want to know if Leangains is a good method to get ripped while bulking (im a bit skinny).
Thanks in advance
Yes it’s a good method, but you’re 17! You’re incredibly young and primed to gain muscle so use this time to eat a lot and train hard.
Yeah but the thing is i’m used to eat junk food whenever i see it! Training hard + junk food won’t have a good effect.
Hello I was hoping you could solve a few questions I have on IF.
I’m 17 and I want to use IF while trying to lose weight. Would you recommend doing this? if so, how?
Would I need to include both cardio and weight lifting into my routine? If so, how many times a week should I do both of them?
Thanks in advance!
Start by just skipping breakfast, and eat 2-3 meals per day. You really only need weightlifting, aim to lift about 3xper week.
Oh really! I thought cardio was needed for weight loss?
Thanks for the feedback!
hello i’m 18 and I’ve been doing “IF” for about 1.5 weeks now and I’ve been hitting the gym hard still and started eating at a deficit 3 days ago and i’m worried that i’m going to lose muscle because of my low protein and carb intake, i’m eating around 2100 calories a day and 160g of protein a day, do you know of any way to know your maintenance level of calories thanks man. love IF so far gives u a ton of energy
A good starting point is by multiplying your BW in pounds by 14 and adjust by adding or subtracting a couple hundred calories as needed. It also varies heavily on your activity level.
Just wondering if you still get the most out of your workouts and recovery under such conditions? I am willing to try it, but I don’t want to reduce my workout performance and/or hurt myself in the gym.
Give it a try. Some people can handle it, some can’t. If you can’t handle it, eat something small before your workout.
Hey, I’m having some problems with the 24hr fast. I usually fast the day before my rest day (Tues 4pm-Wed 4pm). I’m currently on 2600 calorie weekly deficit without including the 24hr fast, but I usually eat 1800 calories on my rest days (calorie deficit). In order for the fast to be successful, how many calories am I supposed to eat after the fast? And would eating all 1800 calories in one meal negate the 24hr fast? I’m super confused :S
Thanks, Chris
Well are you doing Eat Stop Eat or the Warrior Diet?
WIth ESE you, simply eat a “normal sized meal” after the fast but by no means are you trying to fit your entire daily calorie intake in one meal.
WIth the warrior diet, you only eat one meal per day and your goal is to fit your entire daily calorie intake in one meal.
please I need help, as i am a bit confused. I need to drop 15 kilos by this summer. on the non fasting days how many calories should i consume…i was thinking to follow the 5:2 diet, in which i fast for 2 days a week, and on the non fasting days I’ll have 1000 calories, and in addition I exercise 3 times a week at the gym, thanks in advance
well as long as by the end of the week you’re in a deficit, you’re all good.