Workout
Bro Split
The five-day one-muscle-per-day split, what the frequency research says about it, who it still suits, and a complete week if you want to run it.
The session 51 working sets
Day 1 — Chest
| Exercise | Sets | Reps | Rest |
|---|---|---|---|
| Bench press | 4 | 6–10 | 2–3 min |
| Chest fly | 4 | 12–15 | 90 sec |
| Push up | 3 | AMRAP | 90 sec |
Day 2 — Back
| Exercise | Sets | Reps | Rest |
|---|---|---|---|
| Barbell row | 4 | 8–10 | 2–3 min |
| Lat pulldown | 4 | 10–12 | 90 sec |
| Pull up | 3 | AMRAP | 2 min |
Day 3 — Legs
| Exercise | Sets | Reps | Rest |
|---|---|---|---|
| Goblet squat | 4 | 8–10 | 3 min |
| Romanian deadlift | 4 | 8–12 | 2 min |
| Leg curl | 3 | 12–15 | 90 sec |
| Lunge | 3 | 10 each side | 90 sec |
Day 4 — Shoulders
| Exercise | Sets | Reps | Rest |
|---|---|---|---|
| Overhead press | 4 | 6–10 | 2–3 min |
| Farmers carry | 3 | 40 sec | 90 sec |
Day 5 — Arms
| Exercise | Sets | Reps | Rest |
|---|---|---|---|
| Bicep curl | 4 | 10–15 | 60–90 sec |
| Tricep pushdown | 4 | 12–20 | 60–90 sec |
The bro split trains one muscle group per day, five days a week. It is the most common split in commercial gyms and the one with the weakest supporting evidence.
That does not make it useless. It makes it a trade.
What the frequency research says
At matched weekly volume, training a muscle twice a week produces more growth than training it once. That is about as settled as findings in this area get.
The bro split trains each muscle once. To reach a productive weekly volume — say sixteen hard sets for chest — all sixteen have to happen in one session, and the last few land on a muscle already deeply fatigued. Those sets contribute less than they would fresh.
An upper/lower split delivers the same weekly volume across two sessions in four days rather than five.
Where it still makes sense
Advanced lifters can generate more stimulus per session and often need the longer recovery window, which narrows the gap.
Five focused hour-long sessions fit some schedules better than four longer ones.
And there is the argument that beats all the physiology: if this is the split you will actually turn up for, five days a week, for a year, it will outperform a better split you abandon in March.
If you run it
Keep the volume honest — ten to twenty hard sets per muscle per week — and accept that the last sets of a long session are less productive than the first. Lead with the compound movement while fresh.
Consider folding arms into the chest and back days and using the fifth day for a second leg or upper session. That is no longer strictly a bro split, and it is strictly better.
Common questions
Does the bro split work?
It builds muscle, but it is not the most efficient way to. Training a muscle once a week produces less growth than training it twice at matched weekly volume, which is a consistent finding. Plenty of very large people have used it, generally alongside far more training experience and volume than the split itself explains.
Who should use a bro split?
Advanced lifters who can generate enough stimulus in one session to justify the recovery week, people whose schedule fits five short focused sessions better than four longer ones, and anyone who simply enjoys it enough to stay consistent. Adherence beats a theoretically better split you abandon.
How many sets per muscle per week?
Ten to twenty hard sets per muscle group per week is the usual productive range. The bro split's problem is that fitting twenty sets into one session means the last several are performed under heavy fatigue and contribute less.