How Mackenyu built Zoro
A training plan worthy of a Three Sword Style
If you’re reading this, there’s a good chance you already know exactly who Roronoa Zoro is.
Not just “green hair swords guy.”
I’m talking about that guy. The one who lifts boulders for fun, gets lost walking in a straight line, and somehow still ends up exactly where he needs to be when it matters.
And full transparency before we go any further. I’m not a casual fan here. One Piece is my favorite anime of all time. I’ve watched it, rewatched it, and then gone back again just to catch things I missed the first two times. So when I say the standard for this role is high, I mean really high.
So when Mackenyu stepped into the role for the live action One Piece, the standard wasn’t “look decent shirtless.”
The standard was:
Look like you could actually survive in the same world as Zoro.
That means:
- Broad shoulders
- Thick back
- Dense arms
- A core that looks like it’s been through war
And honestly… they nailed it.
But here’s the cool part. The training behind that physique is not some mystical anime-only protocol. It’s actually very grounded in solid hypertrophy principles. Just executed with a level of intensity that would make most people reconsider their gym membership.
Let’s break it down.
The engine of the program: Rest/Pause training
If this program had a personality, it would be rest/pause.
And if rest/pause were a character, it would probably be Zoro during the “nothing happened” moment. Calm on the outside. Absolute chaos underneath.
Here’s how it works:
- Hit 15 to 17 reps to failure
- Rest 20 seconds
- Go again for another 5 to 8 reps
- Try not to question your existence
- Rest 2 minutes and repeat
From a science standpoint, this is about pushing deeper into high-threshold motor unit recruitment and stacking effective reps.
From a lifter standpoint, this is about getting uncomfortably familiar with failure.
Used correctly, it’s incredibly effective. Used on everything, every day, it’s also incredibly fatiguing. Which is why this program uses it heavily but not blindly.
The weekly split
The structure is clean and classic:
- Day 1: Chest and Calves
- Day 2: Back and Forearms
- Day 3: Shoulders and Hamstrings
- Day 4: Arms
- Day 5: Quads
No fluff. No circus tricks. Just a very intentional approach to building a physique that looks like it belongs in a live action anime adaptation.
Each day has a purpose. And more importantly, each day builds a piece of the Zoro aesthetic.
Day 1: Chest and Calves
Goal: Build the upper body armor
Zoro doesn’t look like he does flat bench and calls it a day.
There’s a heavy emphasis on incline pressing here, and that’s not an accident.
Upper chest development is what gives that powerful, “ready for combat at any moment” look.
You’ll see:
- Multiple incline dumbbell presses
- Flat pressing for overall density
- Fly variations for full development
- Weighted dips done with control
The key theme is tension and control over ego lifting.
No sloppy lockouts. No bouncing reps. No turning a chest movement into a shoulder shrug contest.
If you want the chest to grow, the chest has to do the work.
Calves are trained with different foot pressures to bias different areas. Is it detail-oriented? Yes.
But if your job is to look like a Straw Hat Pirate who casually fights warlords, details matter.
Day 2: Back and Forearms
Goal: Width, thickness, and grip strength that actually looks real
Zoro’s back is one of his defining features. Wide, dense, and built like it’s been carrying swords and bad decisions for years.
This day is all about building that.
A lot of the execution cues revolve around keeping tension on the lats instead of letting the arms take over. That alone will fix about 80 percent of most people’s back training.
Key work includes:
- Controlled pulldowns with a focus on the lower lats
- Rows that drive the elbows back instead of pulling with the hands
- Strict dumbbell rows with no spinal gymnastics
- Cable finishers to fully fatigue the muscle
Then you hit forearms directly.
Not as an afterthought. As a priority.
Because if you’re supposed to wield swords, your forearms shouldn’t look like you skipped everything except chest day.
Wrist curls, reverse curls, full range movement. Grip strength and forearm size both matter here.
Day 3: Shoulders and Hamstrings
Goal: The anime silhouette
If you had to pick one muscle group that screams “anime physique,” it’s shoulders.
Big delts create width. They make the waist look smaller. They give that larger-than-life look that translates perfectly on screen.
This day leans heavily into:
- Side delts for width
- Rear delts for depth
- Controlled pressing for overall size
There’s a ton of isolation work, which is exactly what you want if the goal is visual impact.
And importantly, the pressing is done in a joint-friendly way. Because building muscle is great. Building muscle while staying healthy enough to actually perform is better.
Hamstrings are trained with both:
- Leg curls for volume accumulation
- RDL variations for stretch
That combination hits both ends of the hypertrophy spectrum. Shortened and lengthened positions.
If you’ve followed RP content at all, you already know that’s not random. That’s intentional.
Day 4: Arms
Goal: Sleeves that look like they belong in a fight scene
This is a classic alternating arm day.
Biceps, triceps, back and forth.
Why this setup works:
- One muscle rests while the other works
- Performance stays higher across the session
- The pump is borderline illegal
You’ll see:
- Preacher curls for strict biceps work
- Overhead extensions for the long head of the triceps
- Dumbbell curls that push past initial fatigue
- Pushdowns and dips for full triceps development
- Hammer curls to tie in the forearms
The big principle here is controlled reps with constant tension.
No swinging. No momentum. No “it counts because I moved the weight.”
If the goal is hypertrophy, the muscle has to be the limiting factor.
Day 5: Quads
Goal: Build legs without wrecking the rest of your week
This is where the program shifts gears.
No rest/pause here.
Instead, you get:
- Straight sets
- Moderate rep ranges
- Longer rest periods
Why?
Because leg training is systemically demanding. If you try to apply rest/pause here, you’re not just training your quads. You’re testing your will to live.
The focus is on:
- Leg press for pure quad size
- Belt squats to reduce spinal fatigue
- Leg extensions for isolation
- Abductor work for added width
This is smart programming.
You still push hard. But you do it in a way that doesn’t tank your recovery for everything else.
Also, keep in mind, Mackenyu still had to move, fight, and perform on set. Being unable to walk down stairs is not ideal for filming.
The daily core work
Yes, it’s every day
Every session ends with a core circuit.
Sit-ups. Alternating reps. Weighted leg raises.
This builds a core that looks thick and defined. Not just flat.
From a coaching perspective, daily abs are not required. But higher frequency can help if the goal is that dense, blocky look.
Just understand the difference between:
- Doing abs
- Training abs
One builds fatigue. The other builds muscle.
What this program actually teaches
Zooming out, this is not just a “celebrity workout.”
There are real lessons here:
Effort matters more than complexity
You don’t need a complicated plan. You need to train hard enough for it to matter.
Exercise selection should match the goal
This program is built for aesthetics. Every movement supports that.
Volume and recovery are balanced
Rest/pause is used strategically. Leg day is adjusted. Shoulder work protects joints.
Consistency is the real secret
There is nothing in here that works if you do it occasionally.
What you should probably adjust
Before you run this exactly as written and try to become the next Straw Hat, let’s be real.
- You probably don’t need rest/pause on every exercise
- You can get great results with fewer training days
- You don’t need daily abs to have visible abs
- Your nutrition will make or break this
Calories and protein drive the majority of your results. Training is the stimulus. Nutrition is what allows you to adapt.
The bottom line
Zoro is not strong because of a perfect program.
He’s strong because he shows up, does the work, and keeps going when most people would stop.
Mackenyu’s training reflects that.
Hard sets. Smart structure. Consistent effort.
If you want to build a physique that looks like it belongs in the world of One Piece, the formula is simple:
Train hard.
Train with intent.
Recover like it matters.
Eat like you actually want to grow.
And maybe, just maybe, next time you pick up a dumbbell, channel a little Zoro energy.
Just try not to get lost on the way to the squat rack.
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