No chest in bodybuilding history has matched Arnold Schwarzenegger’s. Not in symmetry, not in fullness, not in sheer impact. Seven Mr. Olympia titles later, the Austrian Oak’s pectorals remain the benchmark against which every chest in the sport is measured.
What made it exceptional wasn’t genetics alone — it was a methodical, detail-obsessed approach to chest training that most lifters never replicate because they don’t know what it actually involved.
Arnold worked his chest three days per week, always paired with back in brutal superset fashion, and hit it from every possible angle. Only five years after he began his chest-building routine, his chest measurement went from 39 inches to an extraordinary 58 inches.
Here’s exactly what he did.
Arnold’s Classic Chest Workout
Arnold’s chest routine was built around heavy compound pressing combined with high-volume isolation work. He trained chest with back three times per week, often in the same session, using supersets to keep intensity high and rest periods short.
The workout:
| Exercise | Sets | Reps |
|---|---|---|
| Barbell bench press | 5 | 20, 15, 12, 10, 8 |
| Incline barbell bench press | 5 | 15, 12, 10, 8, 6 |
| Dumbbell fly (flat bench) | 5 | 15 |
| Cable crossover | 6 | 15 |
| Dumbbell pullover | 5 | 15 |
Rest 60–90 seconds between sets. When pairing with back as Arnold did, superset each chest exercise with a back movement — bench press with chin-ups, incline press with rows, and so on — with no rest between the two exercises and one minute between each superset.
The Three Techniques That Made Arnold’s Chest Different
1. The Incline Press from Every Angle
Arnold was especially creative with the incline bench press, which he considered the ultimate move for emphasizing the upper chest. Rather than locking into one incline angle, he would hit his upper pecs anywhere from 15% to 50% incline — targeting upper muscle fibers at varying depths to develop even the smallest muscles most bodybuilders neglect.
His attention to the upper chest at a time when most bodybuilders focused purely on flat pressing is a large part of why his chest looked complete from every angle, not just from the front.
2. The Dumbbell Fly — Arnold’s Favorite Exercise
Arnold stated repeatedly that the flat-bench dumbbell fly was the single most effective exercise he ever did for his chest. He often described the motion as “hugging a tree” — and his execution was specific in ways that most people miss.
He would lie back on a flat bench with slightly bent arms, take a huge breath, then lower the dumbbells out and away from his torso in a very slow, controlled descent. He would raise them back through the exact same arc with an explosive exhalation, contracting his pecs all the way through the movement.
The key detail: at the top of the movement, as tension on the pecs began to decrease, he would stop his arms about a foot apart — not bringing the dumbbells together fully — and begin the descent again from there. This kept constant tension on the pec fibres throughout the entire set. He applied the same technique to cable crossovers, making sure to give his chest a hard squeeze and flex his pecs hard at the point when his arms touched.
3. The Dumbbell Pullover — The Exercise He Credited Most
If the fly was Arnold’s favorite, the dumbbell pullover was the movement he credited most for his legendary chest and back development. Other greats from the golden era — Dorian Yates, Frank Zane — also swore by it.
The pullover trains the chest through a completely different plane of motion compared to all pressing and fly variations. It also directly works the pectoralis minor — the muscle underneath the pectoralis major — which adds thickness and fullness that pressing alone can never produce.
How to do it the Arnold way:
Lie on a bench with only your head and shoulders supported. Form a diamond shape with your hands, palms turned upward, and grip a dumbbell at one end. Position it over your chest with a slight bend in your elbows.
Slowly lower the dumbbell over and behind your head in an arch-like movement until your upper arms are in line with your torso and parallel to the floor. After a brief pause, pull the dumbbell back through the same arc to the starting position, finishing with a hard isometric squeeze of the chest.
Arnold believed this movement helped expand his rib cage and contributed to the barrel-chested appearance that set him apart from every other bodybuilder of his era. Do 5 sets of 15 reps, typically at the end of the chest workout.
The Cable Crossover Finishing Method
Arnold finished his chest sessions with cable crossovers, using them as a detail exercise rather than a mass builder. The purpose was to etch the line down the middle of the chest — the deep central groove that defined his pectoral development in ways that pressing movements alone couldn’t create.
He performed them in a slow, controlled manner with a hard peak contraction at the point where his hands met, squeezing his pecs as hard as possible at that moment before returning slowly to the start. Six sets of 15 reps, always performed with full concentration on the contraction rather than on moving weight.
How Arnold Structured His Chest Training Week
Arnold hit chest three days per week — never two consecutive days — typically on Monday, Wednesday, and Friday. Each session was paired with back, meaning he would alternate between a chest exercise and a back exercise with minimal rest, completing the full workout as one continuous superset circuit.
This approach kept his heart rate elevated, allowed antagonist muscles to recover while the other worked, and packed an enormous training volume into a single session. The full chest and back routine ran approximately 45 minutes at his pace, with nine exercises across 45 working sets.
If you’re not training at Arnold’s level yet, run the chest workout alone three times per week before adding the back pairing. Build up to the full volume over several months.
Why This Routine Still Works
Most modern chest training is bench press-dominant. Heavy pressing, some incline work, done. Arnold’s routine was different in three ways that remain relevant regardless of era:
Angle variation — by hitting the incline press at multiple angles rather than one fixed position, he developed the upper chest from multiple vectors, producing fullness that flat-press-only lifters never achieve.
Constant tension isolation — his dumbbell fly technique kept the pecs under tension throughout the entire range of motion, creating muscle damage that heavy pressing (which unloads the pec at the top) doesn’t replicate.
The pullover — most lifters haven’t touched a dumbbell pullover in years. Arnold’s results suggest that’s a mistake. The unique plane of motion and the pectoralis minor activation it provides fills in development gaps that no other exercise covers.
Frequently Asked Questions
How many days a week did Arnold train chest? Three days per week, always with at least one rest day between sessions. He trained chest on Monday, Wednesday, and Friday, pairing each session with back work in superset format.
What did Arnold say was his best chest exercise? The flat-bench dumbbell fly. He called it the single most effective exercise he ever did for his chest and credited it specifically for the fullness and detail of his pectoral development.
What exercise gave Arnold his barrel chest? The dumbbell pullover. Arnold credited it — along with Frank Zane and Dorian Yates — for developing the chest-to-back thickness that created his iconic barrel-chested physique. It works the pectoralis minor and trains the chest through a completely different plane of motion than pressing or fly exercises.
Did Arnold do decline bench press? His classic routine focused primarily on flat and incline pressing. The incline was his priority for upper chest development, which he varied between 15% and 50% angles. Decline pressing wasn’t a staple of his routine — cable crossovers served the lower chest finishing role instead.
How did Arnold grow his chest from 39 to 58 inches? Through three chest sessions per week, combining heavy compound pressing (flat and incline barbell), high-volume isolation (dumbbell flyes, cable crossovers), and the dumbbell pullover — all performed with strict attention to muscle contraction and full range of motion. The volume, frequency, and technique combination, sustained over five years, produced the measurement increase he documented.
Related:
- 5 Arnold Schwarzenegger Inspired Chest and Back Supersets
- Arnold’s ‘Golden Six’ routine for strength and size
- Arnold Schwarzenegger: “If You’re Serious About Gains, Take These 3 Supplements”
