When preparing for the iconic role of John Rambo in “Rambo II,” Sylvester Stallone turned to an intense arm-focused workout to build his legendary physique.
Despite being nearly four decades old, his brawn from that film still stands as a gold standard in Hollywood muscle transformations.
Behind the scenes, the secret weapon was two-time Mr. Olympia winner Franco Columbu — together, they carved out what Stallone himself called his most muscular look ever.
Now, thanks to a deep dive into that training plan, you can tap into the same set of moves that built Sly’s big-screen weaponry — arms that were as powerful as they looked.
Let’s break down the full routine, how to adapt it to your current level, and exactly how to perform each movement safely and effectively.
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The Workout That Built Rambo’s Arms
This routine is built using supersets — pairing two exercises back-to-back without resting between them — to maximize muscle fatigue and spark rapid growth.
Here’s the entire seven-move sequence:
- A1: Isolated Triceps Extension
- A2: Seated Incline Curl
- B1: Skullcrusher
- B2: Dumbbell Curl
- C1: Dumbbell Triceps Extension
- C2: Barbell Curl
- D: Wrist Curl
How to Adapt It for Your Own Use
Stallone reportedly trained up to four hours a day to prepare for the film. You don’t need to go that far — but you do need consistency, intensity, and smart execution.
Here’s how to structure your training:
- Perform 3–4 sets per superset (e.g. A1 + A2) before moving on to the next pair.
- Aim for 10–12 reps per exercise.
- Rest 60–90 seconds between each superset.
- Choose a challenging weight you can control with perfect form.
Step-by-Step: How to Do Each Exercise
Isolated Triceps Extension
Hold a single dumbbell with both hands, making a diamond shape around the top. Standing or seated, raise the dumbbell overhead. Keeping elbows high, lower the weight behind your head. Pause, then extend your arms to return to the start position.
Seated Incline Curl
Sit on a bench angled to 45 degrees, dumbbells hanging low. Curl the weights up, turning your palms inward. Squeeze at the top, then lower under control. The incline adds a stretch to your biceps, intensifying the load on every rep.
Skullcrusher
Lie flat with an EZ bar held above your face. Lower the weight toward your forehead by bending your elbows. Keep upper arms vertical to maintain tension. Reverse the motion, stopping just short of locking out your elbows.
Dumbbell Curl
Stand or sit tall with arms at your sides. Curl both dumbbells, focusing on contracting the biceps rather than using momentum. Rotate your palms inward as you lift. Lower slowly and repeat.
Dumbbell Triceps Extension
Grab a pair of dumbbells. With weights overhead, elbows next to your ears, lower them behind your head. Keep your core braced and back neutral. Drive the dumbbells upward by fully extending your elbows.
Barbell Curl
Stand with a barbell held shoulder-width in front of your thighs. Curl upwards without swinging your torso. Control the lift and squeeze at the top. Lower slowly, feeling the tension stay on your biceps throughout.
Wrist Curl
Sit with your forearms on a bench or your thighs, palms up holding a barbell or dumbbells. Let wrists drop slightly, then curl up as high as possible. Pause, then lower. Flip your wrists over after completing a set for balanced forearm development.
Why This Workout Works
Supersets combine volume and intensity, driving more blood into the muscles and accelerating hypertrophy. By alternating between biceps and triceps, this workout also allows one muscle group to recover while the other works — keeping your overall fatigue low while maximizing the output of each set.
And by sticking with similar curling and extension movements across multiple angles, you’re hitting every fiber of your arms for comprehensive development.
How to Train Like Sly — Safely
Building arms like Stallone requires patience, proper form, and progressive overload. Always choose technique over ego lifting — curling a lighter weight with strict control will yield better results than swinging a heavy bar with poor form.
If supersets are new to you, start with 2–3 pairings per session and build from there. Recovery is also key: Sly trained hard, but he also prioritized sleep, hydration, and high-protein nutrition to support growth.
The Legacy of Rambo’s Arms
Sylvester Stallone’s 1985 transformation for “Rambo II” wasn’t just for show — it was the result of a carefully crafted, science-informed training strategy under the eye of one of bodybuilding’s legends.
Today, his workout remains a viable blueprint for anyone looking to add size and shape to their arms, especially with limited time or equipment.
Rep it out, get your supersets in, and don’t forget — legend-worthy arms are earned one rep at a time.
