Updated 08/07/2015: I just updated the article below to include more detailed information on how to structure your calorie surplus while lean bulking plus included more information for women as well..
So lately I’ve been getting a bunch of emails and they look something like this:
- “Hey Keith, what’s the best way for me to gain muscle without fat. I want to pack on the size but I don’t want my six-pack to disappear.”
- “Dude I need help gaining muscle but I don’t want to get fat. Is there any way to gain muscle mass without any fat?”
- “I’m not really looking to lose weight anymore, but how do you build muscle without getting fat?”
- “Neglected and lonely housewife. Looking for company. Interested?”
So if you’ve ever wondered what the best way to build muscle with minimal fat is, then this is the article for you.
And my best tip for responding to sex messages on the internet? Don’t respond to sex messages on the internet.
Stay safe.
A note to beginners
If you’re a complete beginner who has never weight trained before, then you have no business reading this article.
Beginners can get away with eating more calories since they have never been exposed to weight training, thus any extra calories will primarily be used to build muscle.
Whereas on the other hand, intermediate and advanced trainees need to be more careful. They tend store any excess calories as fat since they’ve already gone through the initial “beginners growth spurt.”
Structuring your diet for maximum muscle and minimal fat
Gaining muscle with minimal fat is a relatively simple process.
You simply need to eat more on your training days, and less on your off days.
That’s it, in the simplest explanation possible.
By increasing your caloric intake on training days, you’re ensuring that the excess calories are used to build new muscle tissue.
And by eating less on off days, you’re ensuring that you don’t gain any weight.
Make sense? Cool.
Let’s get into more detail.
Calculating your calories for training days and off days
If you already know your maintenance intake then great, use that.
But if you don’t then here is a crap shoot formula that you can use.
I call it a crap shoot because there are simply too many variables to say any formula is 100% accurate. No matter how complex a formula may seem, in the end, it’s just a formula.
Formula to estimate maintenance intake: 15 kcals x bodyweight in pounds.
Women can start a bit lower and a 14x multiplier.
Like I said, the above formula is a crap shoot but it’s a good starting point.
For example, if you’re a stripper and doing your thing on a pole all night, then you’re going to need more calories than some who’s um…not a stripper.
But if you’re sitting at a cubicle for most of the day, then you’re obviously not going to need that many calories.
Basically the more active you are, the more calories you need.
For lean bulking, here’s what your calorie intake is going to look like:
Training day intake: maintenance intake + approx. 500 calories
Off day intake: maintenance intake + approx. 100 calories
Why approx. 500 calories more on training days?
On training days, I want you to eat approximately 500 more calories than your maintenance intake.
I say approximately because it depends on a handful of factors including sex, age, activity levels.
Older guys and women typically need less calories to build muscle. If this is you and you’re only going to the gym and not doing much else, then use a 500 calorie surplus.
But if you’re more active…for example, if you go to college and walk around a lot between classes or have a hard labor job like construction, then you’re probably going to need more than a 500 calorie surplus.
In cases like these, make sure to bump up your calorie surplus anywhere from 700-1000+.
Why approx. 100 calories more on off days? Why not just eat at maintenance levels?
So why do I still want you to eat 100 calories more on off days instead of just staying at maintenance levels?
Because it’s dangerous.
To maximize protein synthesis, you need to be in at least a slight calorie surplus. I have no problem with someone staying at maintenance levels while lean bulking on off days but by doing so you’re being too risky and have a higher chance of being in a deficit than anything else.
This is why you should still aim to be in a slight surplus (i.e. about 100 calories) to reduce any risk.
And no, you won’t get super fat. 100 calories isn’t very much but it’s enough to ensure you’re not in a deficit.
But also remember, if you’re more active on off days, you need to eat more to compensate for whatever extra activity you do.
For example, if you go for a hike on off days, be sure to eat a few extra hundred calories to compensate for the calories burned during the hike.
How should you train?
There is no right or wrong way to train, although most people respond best to hitting each muscle twice per week.
This can easily be done with a 4 day upper/lower body split which has been shown to be incredibly effective with people.
The Titan Series (my intermediate workout series) in Superhero Shredding 2.0 has exactly that.
What’s wrong with traditional bulking?
There are 2 problems with traditional bulking:
1) You get fat as fuck (aka you look like crap)
2) Gaining excess body fat is unhealthy
From a psychological point of view, traditional bulking is 100x easier than losing weight.
You don’t have hunger pangs, you always have energy in the gym, and you can go out to eat stress-free.
This is why people get so excited to bulk. They see it as an excuse to eat whatever they want and rationalize any fat gain with the need to bulk.
Don’t be like most people.
Stay lean and gain muscle.
Patience my friend. Lean bulking takes time. A lot of time.
Remember, the whole point of lean bulking is to gain muscle with minimal fat.
And when you’re not gaining a lot of fat like most people, you’re going to think that you’re not progressing.
If you’re like most intermediate trainers, you shouldn’t expect to gain more than 1 pound of muscle per month.
Sounds pretty shitty, huh?
But what were you expecting?
Everyone has a genetic muscular limit and the more muscle you continue to gain, the slower the gains will come.
And the “1 pound per month” refers to pure 100% lean muscle tissue. If you add 1 pound of muscle, especially if it’s to your arms or shoulders…the differences in your physique are going to be pretty massive.

Conclusion
Basically here’s lean bulking in a nutshell:
- Traditional bulking for non-beginners is unnecessary, sloppy, and unhealthy.
- Eat approx. 500 more calories on your training days depending on your sex, gender, and activity levels.
- Eat approx. 100 more calories on off days depending on your activity levels.
- Train each muscle group 2x per week with a well-structured program.
- Don’t expect to gain more than 1 pound of muscle per month (yeah, muscle growth is painfully slow once you past the newbie stages)
Have a question on lean bulking. Leave your thoughts in the comments below.
keep in mind im on im working out doing a full body 3 x per week with 2 days of hiit cardio. the days I workout is high carb 500-1000 cal over maintenance. the days I do hiit and off days I do moderate carbs calories around maitnence if not a little below and that’s how my numbers came out for the 2 weeks.
Great site and advice. As a beginner-intermediate lifter, I’ve been calorie cycling in the way you describe for many months with good results. However, I have put on a few pounds of fat in the process, which I’m in the process of trying to shed.
I’ve found that the key to staying lean while building muscle is to monitor your average weekly caloric intake and adjust the average calories for the week according to your results. This might entail that you go into a more moderate surplus on training days and go to maintenance or even into a slight deficit on off days.
I have found that with this strategy I can still progress in the gym, while slowly taking inches off my waist (patience is key!). The body can build muscle only at a certain rate. If you provide more calories than it needs in this process, they get stored as fat. So, in my opinion, it’s actually perfectly OK to go into a deficit on off days if you find yourself putting on too much fat while calorie cycling. It will not hurt your muscle gains. Just be sure to keep daily protein levels at around 1g/lb bodyweight throughout the week and you’ll be fine.
In regards to the calories surplus over maintenance. The +100/+500 puts you at a monthly surplus of about 7800 (figuring 30 days per month on a 3 day/week split). You mention later in the article to not expect to gain more than 1 lb a month. But doesn’t it take 2500 calories to build one pound of muscle? So wouldn’t this be excessive at a 7800 surplus? I am beginning my first lean bulk next week and want it to actually be a lean bulk. What are your thoughts on this?
it’s 3500.
But no, it’s not excessive because also need to take into account the calories burned via exercise.
And you will gain some fat even when lean bulking. You won’t get fat but you won’t stay at a shredded 5% body fat while gaining 5 pounds of muscle. I don’t know ANYONE who gains 100% lean muscle mass and zero fat when “lean bulking.” It just never happens. And if you try to make it happen, you’ll likely get nowhere at all.
Sorry the 2500 was a typo. When I determine my maintenance I factor everything in already over the course of a month based on calories taken in versus weight lost/gained and come up with a daily Maintenance calorie intake amount. For me this number is 3060 at my current weight and activity level. If I www to eat 3160 on off days and 3560 on lift days(3 days a week) I would be up around that 7000+ a month which would be closer to 2 lbs a month with probably an increased risk of gaining excess fat. So what would you recommend in this case?
Ok i get what you’re saying.
But you’re forgetting something:
You’re talking about 7000 total calories. That’s 2 pounds but you’re likely going to end up gaining about 1 pound of lean muscle mass during the month and about 1 pound fat.
Gaining 1 pound of muscle and 1 pound of fat PER MONTH is pretty fucking good all things considered. If you’re still insanely paranoid about fat gain, throw in a mini cut for 7-10 days every 6 weeks.
Sure you could subtract about 1800 or so cals if you didn’t aim to eat 100 over maintenance on rest days then you risk potentially not hitting at least maintenance level and that’s simply not worth it.
Awesome article, just to clarify on my training and work days my TDEE is around 3800-4000 calls, I would need to consume 500 calls over my TDEE. And then on my one rest day my TDEE is 3000. Thanks again.
Yup. On rest days you could do 3000, but I like to do +100 just to be safe, so 3100.
Freaking awesome article! Funny as hell lol. Working on getting certified as a trainer and often get tired of looking at my books and search the net where you just made my day:) Thank you
Thanks Ginger.
Loved this article!!! My BMR is 1244. I’m 18, female and 121 pounds with 25% body fat. I’m working out 5-6 days a week at least 50 min. 2 leg days 1 arm and 1 back and one cardio. How many calories would you suggest on training days and how many on my off? I’m trying to get rid of all the “fluff” on my stomach.
If you’re trying to get the fluff off, then why are you lean bulking? Why not just focus on cutting a bit.
Because I’d like to get the booty gainz going!
ok understood. But you can’t expect to lose fat while that’s happening. Either you gain muscle while maintaining your current level of BF, or lose some BF and then focus on gaining muscle. Your choice.
okay gotcha, if I chose to maintain and gain muscle how do I go about that and not gain any extra fat?
Like i said in the post….
While theoretically possible through exact calorie/macro intake, from a practical standpoint, I’ve never seen it done before.
Everyone who “lean bulks” ALWAYS gains at least a tiny bit of fat. Nothing crazy but it’s never zero fat.
You need to be in a deficit to lose fat, you will NOT lose fat while intaking MORE calories than you burn. You should really focus on leaning down to about 15-17% first if you want your muscles to be more defined and visible. Even though they won’t be as big they will look better with more definition. trust
What about macros? What should I aim to eat in terms of carbs, fats and proteins so that my gut doesn’t end up increasing in size? I’m already so conflicted by the way my body works that I feel increasing my calories by 500 would ultimately leave me fat and looking like shit for 3/4 of the year… Currently I’m just eating around 1900-2100 calories a day and I’m finding that I’m not gaining muscle but my gut isn’t going and nor is my overall body fat percentage… Went on a short-term shred and lost 6 kg in 3 weeks but after that I just can’t seem to 1 lose this gut and 2 gain any muscle… Any tips? I’m currently just having around 30% protein and 50% carbs. Should I aim for 40% proteins and 40% carbs or maybe lessen carbs even further?
I doubt it’s an issue with your macro ratios at this point and a larger issue with deciding what your overall goals should be at this point.
You seem to really want to lose fat and “get rid of your gut” but in reality you might just need to build up your abs more.
if you want, email me a pic of you.
Sorry I can’t find your email anywhere, could you please provide me with it here?
Thanks.
C’mon man….check the contact page.
[email protected]
Sorry haha didn’t know you owned the entire website
Hello, first of all I wanted to thank the author for this nice article. Gave me some really useful piece of advice. I wanted to ask a thing… I am the typically athletic but skinny guy, who entered the gym and got 7kgs in 3 months by maintaining my bf, just by eating the whole day. Never estimated the calories but now I think of them it was around 2500-3000. I always get stack at 85 lag though, which is my current way.
I’m not a newbie, just hadn’t trained for 2 years cause of a wrist injury. To the point, ur crap formula estimates that I have a 2800 calories BMR, when most BMR calculators won’t give me more than 2000. But I find 2000 pretty low for my needs. What BMR should I stick with? I am 20yo, 180cm, 85kg. Thanks in advance
BMR means you’re doing NOTHING. No eating, no exercise, zero movement.
So you need to account for all that stuff, which is why the formula is at a 15x multiplier for your BW in pounds.
I’ve read about lean bulking programs where the calories were exactly the same as this..+500 on training days and +100 on rest days. It was advised to do this for 3 weeks followed by 1 week of eating at a deficit of 400 to 500 calories. Would this be a good approach? Thanks!
The deficit after 3 weeks would only be needed if you put on more fat than you desire. If you do it right, it’s not needed.
I’m about to start a lean bulk I still wanna do one hiit cardio session a day how many calories should I add because of that
A couple hundred.
hello there as far as i can see i am an ectomorph .when i started in 2004 i was 56 kg now i am 75 kg in between i lost 15 kg but i think it was only fat .i deadlift 160 kg and squat 120 kg .also 2 times i week i run 8k and sprints also 100m 250m .as i can see in mirror most likely my body fat is between 12-14% .do you think its possible to increase my strength while keeping my diet same? .i feel that i can increase my strength ,will see my strength gains at the end of yeari am not going for increase in weight bcz by gaining strength i will increase my weight also .till what weight gain can i keep my diet the same ??
You mean increase strength while staying at maintenance calories and not trying to gain or lose any weight? Yes it’s possible. But remember, gaining strength doesn’t equal gaining muscle.
Refreshing info from all the “EAT 10,000 CALORIES A DAY OR YOU WON’T GROW” bs I often see.
I have a question about calculating calories – using the supposedly highly-accurate Katch-Mcardle formula I get a sedentary TDEE (1.2x BMR) of 1900 calories per day, which is lower than even the female 14x multiplier which gives 2100 calories (I’m a 150lb 18%bf male).
I know it’s all supposed to be rough guidelines, so tbh I’m trying to, er, “get permission” to eat the higher of the two figures (ex-fat guy, loves eating, still suffering from fatlogic).
I guess what I want to hear is, would 2200 calories on off days for a 150lb 18%bf male still be a lean bulk? If I went with the Katch-Mcardle formula I’d be eating 2000 calories on off days, which is a much more depressing number than 2200 calories per day.
Any formula, even the KM formula is a crap shoot at best. The only way you’ll really know how much to eat is by experimenting and seeing how your body responds.
The big problem is when people get so caught up in the formulas that they just end up doing nothing because they fear the calorie calculation is not “perfect.”
What should I split the extra 500 and 100 calories into? Should I eat more protein, carbs, fat….a mixture of everything?
I would aim for mostly carbs.
Great article! This topic is not adequately documented so glad to see you post it. I have been following this fuel pattern for a long time based on trial and error and I’ve gotten bigger and leaner. I always wondered about it and it’s nice to finally see confirmation that I got it right. I also like that you come right out and say the formula is inexact for a number of reasons (just like the ridiculous one-size-fits-all magic 2000 calorie DV for all humans printed on every food label in the universe). People get hung up on calculators and completely disregard the actual results of their nutrition. The results are the best indicator of your nutritional accuracy. Start where the calculator says to and then adjust based on results. I never change by more than 100 cals at a time to keep it dialed in.
Right. It’s impossible to tell people how much to eat based on any single formula. You have to test and experiment for yourself.
I’m in the process of bulking and so far it’s going well I’ve gone from 11.12 stone, to 12.7stone and I’m 11% body fat, but I’m having a real problem with eating on my off days. I’ll have breakfast and then dinner so not hitting my caloric needs, but there’s not much I can do to change this as I work nights. And can’t keep my eyes open in the morning, so 4 days intense lifting 3717kcal intake but on off days I’m lucky if I hit 500 – 1000kcal anything I can do would be really helpfull
Wait are you saying you can’t eat more than 1000 cals on rest days?