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Illustration of a man recomping—burning fat while building muscle.

Body Recomposition: How to Build Muscle While Losing Fat

Body recomposition is when you build muscle while losing fat. It sounds like the Holy Grail, but it isn’t quite so rare as that. Recomping is realistic for most people. We’ll show you client transformations and study results.

You can recomp by lifting weights, doing cardio, eating a better diet, or improving your sleep. We’ll delve into each of those methods, including the results you can expect with every change you make. But you can do much better than that.

The shotgun approach is when you do a few different things, hoping at least one of them gives you the results you want. We’ll take a firing squad approach, firing several well-aimed bullets. Each method is strong enough to reliably produce results. Together, they’re truly fearsome.

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Illustration showing an artificial giant with too many fingers. He is holding a skinny man who is bulking up to become muscular.

How to Bulk Up: The Complete Guide for Skinny Guys

I was underweight well into my twenties. I would read guides about how to build muscle, and I would try them, but they wouldn’t work. They would urge me to bulk slowly and leanly, filling me with a fear of fat gain. But I wasn’t scared of gaining fat. That wasn’t my problem.

I wanted to build muscle fast—as fast as I possibly could. I didn’t care if my gains were perfectly lean, I just didn’t want to be skinny anymore. So, I ignored the conventional wisdom. I bulked more aggressively, gaining 20 pounds in 3 months, and to my great surprise, I didn’t even gain a noticeable amount of body fat.

Shortly after that, I came into contact with Marco, a strength coach helping college, professional, and Olympic athletes bulk up during their off-seasons. He was as naturally skinny as I was. He taught me how to bulk the proper way. I gained another 25 pounds in another 3 months.

Since then, we’ve helped 15,000 other skinny guys replicate those same results. In this article, we’ll teach you how you can do it, too.

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Illustration of a skinny guy using an upper-body workout routine to build bigger muscles.

The Best Upper-Body Workout for Building Muscle

An upper-body workout trains most of the muscles in your upper body. When you split your body in two, you could train it half as much but twice as often, making your workouts shorter and easier. Or you could devote more time and energy to the muscles you’re training, giving them a greater stimulus to grow.

These upper-body workouts go best with at least one lower-body per week. There was a primeval species who neglected to do so, and with every generation, their legs withered away. Undeterred, they propelled themselves through the air with their powerful arms and chests. That is how birds came to be. That’s why people who skip leg day are called chickens.

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Illustration of a beginner doing an arm workout to build bigger arm muscles.

The Best Beginner Arm Workout

Do beginners even need an arm workout? Think of programs like Starting Strength and StrongLifts 5×5. Neither of them have any arm exercises, let alone a dedicated Arm Day. That can cause your arms to lag behind the rest of your muscles.

It’s also common for beginners to jump into advanced bodybuilding routines that aren’t very good for novices. The training splits are needlessly complicated, the arm workouts are total overkill, and the routines still aren’t ideal for building bigger arms.

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Illustration of a bodybuilder doing an Arm Day workout to build bigger arm muscles.

The Best Arm Day Workout for Building Muscle

Arm Day is an entire workout routine focused purely on arm exercises. It’s what allows the Bro Split to stimulate more arm growth than almost any other workout routine.

Arm Days are simple in theory. Arm muscles aren’t hard to train. But you still need a fruitful combination of exercises. If you’re doing more than one type of biceps curl or triceps extension, you’d best have a good reason for it. We’ll explore those reasons.

You also need to watch out for putting too much stress on your elbow joints. It’s common for barbell curls, skull crushers, and overhead triceps extensions to hit the elbows pretty hard. We’ll teach you how to navigate those perilous waters.

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Before and after illustration of an overweight man becoming lean and muscular.

Is Lifting Weights Good for Burning Fat?

Most of us can grit our teeth, go on a diet, and lose some fat. Most popular diets, ranging from keto to veganism, really do succeed at helping people lose weight (study, study). The problem is that motivation ebbs and flows.

When you finish a successful diet, you’re still the same person you were before. You still have the same appetite—the same stomach. The difference is you’re carrying less weight and burning fewer calories. That can make it extremely difficult to stay lean.

That’s where weightlifting comes in. A good workout can burn 200–400 calories, and that helps, but you can burn more calories by walking, jogging, or rucking. That isn’t why it’s valuable.

A pound of muscle burns around 6 calories per day at rest, but you also need to carry it around with you, causing it to burn closer to 12 calories per day. If you can gain 20 pounds of muscle, that’s an extra 240 calories burned without needing to do any extra exercise. If you build enough muscle while losing fat, you can eat the same amount of food you were eating before without regaining fat. That helps, but it’s still not the most important part.

The main reason lifting weights is so powerful is that when you inevitably start to regain weight, you’ll build muscle instead of storing fat. Your metabolism will increase as you build that muscle. You’ll eventually settle at a weight that’s easier to maintain.

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Illustration of the best muscle-building exercises to use in a hypertrophy training program.

The Best Hypertrophy Exercises

Different exercises are designed for different goals. Powerlifters use the squat, bench, and deadlift to demonstrate their maximal strength. Olympic weightlifters use the snatch and clean-and-jerk to demonstrate their explosive power. And bodybuilders use hypertrophy exercises to stimulate muscle growth.

However, hypertrophy training is for more than just bodybuilders. Bigger muscles are stronger muscles, so anyone interested in being bigger, stronger, faster, healthier, or better looking will go through phases of hypertrophy training to gain more muscle mass.

This article is about the best exercises for stimulating muscle growth. It’s up to you what you decide to use those muscles for.

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Illustration of a bodybuilder training his back muscles with a Back Day workout.

Back Day: The Best Back & Biceps Workout for Building Muscle

Back Day is designed to bulk up your back. It’s part of a Bro Split, so it’s a workout that emphasizes building muscle and improving aesthetics.

Your back isn’t just one muscle group. There are dozens of overlapping muscles, all with slightly different functions, yet all equally eager to grow. We’ll show you how to stimulate all of them.

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