What Is the Arnold Split?
The Arnold Split is a training split popularized by Arnold Schwarzenegger during his bodybuilding career. It divides training into three days: chest and back, shoulders and arms, and legs. Each cycle is performed twice per week across 6 training days, hitting every muscle group with high volume and frequency.
The defining feature of the Arnold Split is pairing antagonist muscle groups — chest with back, biceps with triceps. This allows for supersets between opposing muscles, which increases training density and creates a stronger pump compared to traditional splits.
Who Is the Arnold Split For?
This split is designed for intermediate to advanced lifters who prioritize muscle size and aesthetics. It requires 6 days per week in the gym and the ability to recover from high-volume training. Lifters with at least a year of consistent training experience who want to maximize hypertrophy will get the most out of this program.
It is particularly popular among recreational bodybuilders and lifters who enjoy the training style of the golden era of bodybuilding — high volume, high intensity, and a focus on the mind-muscle connection.
Antagonist Supersets Explained
An antagonist superset pairs two exercises that work opposing muscle groups — for example, bench press (chest) with barbell rows (back). You perform one set of the first exercise, rest briefly, perform one set of the second exercise, rest, and repeat. This approach keeps your heart rate elevated, shortens total workout time, and may allow you to lift slightly more weight on the second exercise due to reciprocal inhibition (the opposing muscle relaxes more fully after being stretched).
Frequently Asked Questions
What makes the Arnold Split different from PPL?
- The Arnold Split pairs antagonist muscle groups (chest with back, biceps with triceps) instead of grouping by movement pattern (push vs pull). This pairing allows you to do supersets — alternating between opposing muscles — which increases workout density and reduces total session time. PPL groups muscles by function (pushing or pulling), which some lifters find more intuitive.
How many days per week is the Arnold Split?
- The Arnold Split runs 6 days per week: Chest/Back, Shoulders/Arms, Legs, then repeat the cycle, with one rest day. This means each muscle group is trained twice per week with high volume. The schedule is demanding and best suited for advanced lifters with good recovery capacity.
Is the Arnold Split good for building muscle?
- The Arnold Split is excellent for hypertrophy. The high volume (6 training days), high frequency (each muscle twice per week), and antagonist pairing all support muscle growth. Arnold Schwarzenegger used this split during his competitive bodybuilding career, and it remains popular for lifters focused primarily on building size.
Can I do supersets on the Arnold Split?
- Yes — supersets are a hallmark of this split. On chest/back day, alternate between a chest exercise and a back exercise with minimal rest. For example, a set of bench press followed immediately by a set of rows. This keeps training intensity high, saves time, and creates a significant cardiovascular demand.
Is the Arnold Split good for beginners?
- No. The Arnold Split requires 6 days per week and uses high volume per session, which is too much for most beginners. Beginners lack the work capacity, recovery ability, and movement proficiency to benefit from this much training. Start with a full body or upper lower program and work up to the Arnold Split after at least 6–12 months of consistent training.