Arnold Split Explained: A Plan for Natural Lifters

The Arnold split is chest and back on one day, shoulders and arms on the next, then legs, run twice a week. Six sessions, one rest day, every muscle trained twice.

It works for natural lifters. But not the way Arnold ran it, and not as your first program. Here's what the split is, what to change, and how I'd set it up if you want to give it a go.

What the Arnold split is

Arnold Schwarzenegger popularized this structure in the 1970s, and it's still the template people mean when they search for his workout routine:

The pairing is the clever part. Chest and back are opposing muscles, so you can alternate a press with a row and one rests while the other works. Shoulders and arms get a whole day to themselves, which is more direct arm and delt work than most splits give you.

Why Arnold's version doesn't transfer

The routines published under his name had 20 or more sets per body part in a session, and he often trained twice a day. He was also a full-time professional bodybuilder whose job was training, eating and recovering, and he's said publicly that he used steroids when they were legal.

None of that makes the structure bad. It just means the volume is the part to throw out. If you copy his set counts on a normal job and normal sleep, you'll be sore and flat by week three, and the last ten sets of every session will be junk.

So the version below keeps the structure and cuts the volume to something you can actually recover from.

The natural-friendly Arnold split

This is the plan from the Arnold split page. Warm up with a couple of lighter sets on the first lift. Rest 2–3 minutes on the big presses, rows and squats, 60–90 seconds on everything else.

Chest & Back

Shoulders & Arms

Legs

Swap tools freely. A machine chest press for the bench, a hack squat for the back squat, a chest-supported row for the barbell row. Keep the movement, pick the version your gym has and you enjoy, then stick with it so you can track it.

Even trimmed, it's a lot of work

Here's how the weekly working sets compare with the 6-day push pull legs plan on this site:

Chest and back get about a third more, and the shoulders-and-arms day adds close-grip bench on top of all the pressing. That's the point of the split, but it's also why I'd only run it if you're already training consistently and recovering well: sleeping enough, eating enough, and not dreading the gym by Thursday.

If you're coming from a lower-volume split, ease in: for the first few weeks, do 2 sets on everything except the first two lifts of each day, then add the sets back once the week feels routine.

Fewer than 6 days

3 days. Run each day once: Chest & Back Monday, Shoulders & Arms Wednesday, Legs Friday. Every muscle gets trained once a week, which is on the low end, but it's a fine way to try the split.

The rotation. Run the three days in order and take a rest day after each cycle: Chest & Back, Shoulders & Arms, Legs, Rest, repeat. That's four or five sessions a week, and the days drift across the calendar. I like this one for natural lifters. You keep the twice-ish frequency and get a rest day every fourth day.

If you've only got 4 or 5 days and want everything twice a week, I'd skip the Arnold split and run upper lower or the PPL upper lower split instead.

Progressing on it

Same as any split: double progression. Work in the rep range until you hit the top on every set, then add about 5 lb (2.5 kg) to upper-body lifts or 10 lb (5 kg) to lower-body lifts and work back up. If a lift stalls for three or four sessions, drop it about 10% and build back.

One thing specific to this split: shoulders and arms comes the day after chest and back, so your front delts and triceps are still a bit tired from benching. Expect your overhead press and close-grip bench to be a little lower than they'd be fresh. That's fine, as long as they're going up over the weeks.

Who it's for

The Arnold split suits lifters with a year or more of consistent training who can get to the gym 6 days a week and want extra shoulder and arm work. If you're newer, start with full body or the 3-day push pull legs on machines, and earn six days later. Not sure where you land? Here's how to pick a workout split by how many days you can train, and how it stacks up against a bro split.

Quick answers

Is the Arnold split good for natural lifters?

Yes, with lower volume than Arnold used. Around 3 sets per exercise and 16 weekly sets for chest and back is plenty. It's still a demanding split, so run it once you're training consistently, not as a first program.

What was Arnold Schwarzenegger's workout split?

Chest and back, shoulders and arms, then legs, each trained twice a week over six days. He used far more sets per session than the plan above, often across two sessions a day.

Can I do the 6-day Arnold split on fewer days?

Yes. Run each day once over 3 days, or rotate the three days with a rest day after each cycle for four or five sessions a week.

Arnold split vs push pull legs: which is better?

At 6 days, both train every muscle twice a week. The Arnold split gives chest, back and arms more direct work and makes for longer sessions. Push pull legs is a little easier to recover from. Pick the one you'll keep showing up for.

Should I superset chest and back?

You can. Alternating a press with a row saves time since one muscle rests while the other works. Keep 2–3 minutes between rounds on the heavy lifts.