Illustration of a skinny guy building muscle on keto.

Can You Build Muscle On Keto? Most Research Says You Can’t

People have been using keto to lose weight for the past 200 years. For example, in the 1970s, it saw a surge in popularity because of the Atkins Diet, which started with a strict ketogenic phase.

During that same time period, bodybuilders have leaned towards higher-carb diets. Conventional bulking diets get most of their calories from carb-rich foods like rice, potatoes, sweet potatoes, oats, bananas, yogurt, beans, and lentils.

What happens if you try to use a ketogenic diet to build muscle? Will it hinder muscle growth? Can it yield leaner gains?

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Illustration of a powerlifter doing strength training.

Is Strength Training Good for Building Muscle?

Is strength training good for building muscle? Some of the most popular programs that skinny guys use to bulk up, such as StrongLifts 5×5 and Starting Strength, are designed for gaining strength. But what if we’re trying to become bigger and stronger? Are strength training programs good for building muscle?

If we look at a recent study comparing low-rep training strength training against moderate-rep hypertrophy training, we see that hypertrophy training stimulates more than twice as much muscle growth per set. Does that show that hypertrophy training is better for building muscle?

There’s new research coming out showing that doing metabolic training in higher rep ranges increases muscle growth by increasing the amount of fuel in our muscles—sarcoplasmic hypertrophy. Lower-rep training is thought to stimulate muscle growth via myofibrillar hypertrophy. Does that mean that strength training builds harder, denser muscles?

Are the big three powerlifting lifts—the back squat, the bench press, and the deadlift—the best lifts for building muscle? And how crucial are isolation lifts when bulking up?

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Muscle Size and Strength Standards for Ectomorphs

How much muscle and strength can an “ectomorph” gain? Plenty of research has looked into rates of muscle and strength gain, but what if you’re a naturally skinny guy? Are there different strength standards for us?

Skinny guys do start off with less muscle mass, but what effect does that have on how quickly we can grow? Do we have an extended period of newbie gains, allowing us to gain muscle and strength more quickly? Or does having less muscle mass indicate that our genetics are poor, causing us to build muscle more slowly?

We have thinner bones and narrower frames, and we tend to start off weaker. Does that limit how strong we can become?

In this article, we’ll go over two main questions from an ectomorph’s perspective:

  1. How much muscle can an ectomorph gain in his first year? Most guys can expect to gain around twenty pounds of muscle during their first year of lifting weights. How does that change for an ectomorph?
  2. How strong can an ectomorph get after a year of lifting weights? With a good workout routine, most guys are able to bench press 225 pounds (100kg), squat 315 pounds (140kg), and deadlift 405 pounds (180kg). Are these numbers realistic for ectomorphs?
  3. What’s an ectomorph’s lifetime muscular genetic potential? If we lift for a lifetime, how big can we hope to get?
  4. How strong can an ectomorph get with a lifetime of serious training? If we develop our muscles to their full potential, how strong can we hope to become?

Let’s dive in.

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Should you lift while sore? Is it bad not to feel sore after a workout? Is soreness in your lower back normal?

DOMS: Is Muscle Soreness A Sign of Muscle Growth?

When I first started lifting weights, I was absolutely crippled by muscle soreness. I would wince when sitting in chairs, struggle to lift my knees high enough to climb stairs, and barely be able to get glasses from the cupboard. I loved it. I was sick and tired of being skinny, and I thought muscle soreness was a sign that my muscles were growing.

A couple of months later, my soreness faded away to almost nothing. I could sit down in a chair without everyone in the room grimacing. I could even hold myself upright in it. I started to feel less like a burning puddle of oil, more like a human being. It was awful.

My gains had started to slow down as well, and I was convinced that my waning muscle growth was connected to my fading muscle soreness. Was my fading muscle soreness causing my plateau?

Muscle soreness is intimately connected to muscle growth, but most have no idea how it works, making the process more confusing. So in this article, let’s go over a few of the more common muscle soreness questions that we get:

  • What’s the link between muscle soreness and muscle growth?
  • How much muscle soreness is good?
  • Should you work out if you still feel sore from the last workout?
  • Can muscle soreness interfere with muscle growth?
  • What can you do to reduce muscle soreness?
  • Can you build muscle without getting sore?
  • What if a muscle never gets sore?
  • What if your joints or tendons get sore?
  • What if your lower back gets sore?
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How to know your bodyfat percentage using the mirror as a skinny or skinny-fat guy

The Skinny Guy’s Guide to Body-Fat Percentage

As a skinny guy, it can be hard to figure out what your body-fat percentage is. Imagine the average man. A DEXA scan measures him at 24% body fat. Then he sits in the BodPod, which puts him at 26%. A bit of a discrepancy, but he can be reasonably confident he’s between 24–26%.

Now you walk in, and DEXA puts you at 9%. Not only are you lean enough to bulk aggressively, but you’re also leaner than most professional athletes. You may even want to gain a bit of fat. But when you step into the BodPod, it measures you at 22% body fat. That’s a bit high. You might want to lose some fat.

You’ve spent a few hundred dollars getting the two most accurate tests, and you don’t even know if you have too much or too little fat. For guys who are underweight, DEXA and BodPod can be off by up to 13%!

So in this article, we cover why your body-fat percentage matters, how to measure it properly, and then run through some real-life examples (with pictures).

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The Best Clothes for Skinny Guys

Being a man is about being a good person, and part of being a good person is knowing how to fit into society. Demonstrating that social savvy will make you more attractive to women, earn you more respect with other men, and make frailer people feel safer around your strength instead of threatened by it.

As you gain more strength, that last point becomes more important.

There are a few things we can do. Being polite, knowing when to smile, improving our posture, and knowing what to wear.

Even by just fixing up our style, we can start living better almost instantly.

But for us ectomorphs, things are not quite so simple. We’ve got a rarer body type, and it can be hard to find clothes that fit and flatter us.

Then as we build muscle, we look better in clothes, yes, but new challenges are introduced. Having a butt means switching to a whole different cut of jeans. If you don’t, you’ll blow out the crotch.

Building up bigger shoulder muscles will bring you up a shirt size, but that bigger shirt will be enormous around your still-slim waist.

So now that you’ve bulked up and you need to buy new clothes anyway, let’s see if we can help you do it right.

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A Conversation On Aesthetics and Fitness

In this article we’re going to do something a little bit different. The idea came from one of our members. He started off by saying something fairly controversial. Then, as other members prodded him, instead of backing away from it, he doubled down. And I think his arguments are pretty compelling.

First, let’s set the stage. In our articles about attractiveness, we make the argument that attractiveness is visible health. Being very attractive just takes that one step further. Instead of looking healthy, you’d have to look healthy in a way that truly stands out—you’d have to be conspicuously healthy.

For an overweight person, the best way to build a more attractive physique is to become visibly healthier by losing fat. For us skinny guys, the best way to become more attractive is usually to build muscle. There are lots of objective goals you could set: bringing your BMI to 23 with abs, becoming 50% heavier than your date/girlfriend/fiancée/wife, or building your biceps up to the size of your neck, to name a few.

At first, progress can be very quick. If you’ve read our newbie gains article, then you understand exactly how quick. The interesting thing is that the 80–20 principle applies here. What I mean is that with a small amount of time investment—just a couple months—a skinny guy can usually get to the point where he looks healthy and fit. He’ll look attractive.

Not alarmingly attractive, but attractive.

At that point, progress will slow, and it can take a lot more time and effort to get to that next, very attractive level. After all, looking healthy is one thing, but looking so healthy that people go, “Wow, that dude looks healthy!” is a whole other thing.

But physical attractiveness isn’t the only way you can boost your attractiveness. It’s not even the only physical way that you can boost your attractiveness.

That’s where Rick J comes in.

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Illustration showing the three somatotype body types: endomorphs, mesomorphs, and ectomorphs.

The Male Body Types: Ectomorph, Endomorph, Mesomorph

In bodybuilding and fitness communities, people commonly use the terms endomorph, mesomorph, and ectomorph when talking about male body types. Endomorphs are purportedly stockier and chubbier, mesomorphs are said to be broader and more muscular, and ectomorphs are supposedly thinner and leaner.

Or that’s what people say, anyway. Men do have varying heights and bone structures, and have different propensities for being overweight or underweight, but do these traits really combine together to form three distinct body types? Is it correct to call a naturally skinny guy an ectomorph?

And even if we do use these slang terms to sort people into different body types, do the different body types benefit from different diets and workouts? For example, is there such a thing as an ectomorph workout or an ectomorph bulking diet? Or do all body types benefit from the same workouts, diets, and lifestyles?

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The Social Workout: A Skinny Guy’s Guide to Confidence

A few weeks ago we got an email from a Beastly member, Nick, saying that he had referenced our Ectomorph Aesthetics article on his site. He thought that it perfectly described the physique that women find the most attractive. That got me curious about what his site was all about, so I checked it out.

It turns out that Nick has started up a business teaching guys how to improve their confidence so that they can meet women in an honest, authentic way. This confidence extends to success in business and with friends.

His approach hit home with me.

As a skinny guy, building muscle was so important to me because I thought my skinniness would prevent me from attracting the amazing woman who I wanted to raise a family with, or that it would prevent me from defending her. My confidence suffered as a result, and I approached muscle-building with a sense of desperation.

By the time I met the woman of my dreams, I had gained over fifty pounds of muscle. We spent our first date drinking beer, chatting, and doing handstands in the park.

A couple of days ago my friend asked her what she first noticed about me. I was surprised by her answer. It wasn’t my long hair or tattoos; it was how strong I looked. She even told her roommate about it after our date.

As someone who runs a fitness website for skinny dudes, I wish I could tell you that she fell in love with me because of that strength. It sure made a strong first impression, but I think she fell in love with me because of something else.

Being a strong guy has value. So does being a confident guy. But being someone who can turn a weakness into a strength is the real ticket.

I think it’s amazing how Nick now makes his living teaching other guys how to do the thing he was known for being awful at. He turned his greatest weakness into his greatest strength.

This article might help you do the same thing, and if you’re a single guy looking for love, this could even be the article that changes your life.

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Illustration of a skinny hardgainer with an ectomorph body type.

How to Know If You’re an Ectomorph

Most of us ectomorphs describe ourselves as being naturally skinny and we tend to have a hard time gaining weight. More specifically, though, ectomorphs are usually defined by having narrower shoulders, lankier longer limbs, thinner bones, and a lower body-fat percentage. Being an ectomorph is also associated with having a higher metabolism and a smaller stomach.

If you’re curious about whether you’re an ectomorph or not, there are a few simple tests that you can do. All you need to do is measure the width of your frame, the thickness of your wrists, and the length of your muscle bellies. You can do it at home in just a couple of minutes.

We’ll also cover how the various ectomorph traits affect our ability to build muscle, what our genetic muscular potential is, and how we should approach bulking up.

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