Bro Split
A training split dedicating one day to each muscle group, training each muscle once per week.
Updated
The bro split assigns one day per week to each muscle group: chest day, back day, leg day, shoulder day, arm day. While popular in bodybuilding culture, research suggests training muscles twice per week may be more effective for growth. However, the bro split can work well for advanced lifters with high training volumes.
What a bro split is
A bro split is a weekly programme that gives each major muscle group its own day, so each one is trained hard once and then rested for about a week. A typical layout runs Monday chest, Tuesday back, Wednesday shoulders, Thursday arms, Friday legs, with the weekend off. The name comes from its popularity in commercial gyms and bodybuilding magazines rather than from any evidence base, but it is a legitimate way to train.
How it compares with higher-frequency splits
Early comparisons suggested training a muscle twice a week beat once. Later pooled analyses found that when the total number of weekly sets is the same, frequency on its own makes little measurable difference to growth. So the honest problem with a bro split is practical. Fitting 15 or 20 hard sets for one muscle into a single session means the later sets are done tired and their quality drops, while spreading them over two sessions keeps more of them productive. Miss one session and that muscle goes two weeks untrained. In its favour: it is simple, focused, enjoyable for many people, and gives each muscle a full week to recover.
Making a bro split work
Cap each session at roughly 10 to 15 hard sets for the main muscle; past that, extra sets add fatigue rather than growth. Use the overlap deliberately: chest day also works the triceps and front shoulders, and back day works the biceps, so arms get indirect work on top of arm day. Avoid putting shoulders the day after chest, when the front shoulders are still tired from pressing. And if a muscle is lagging, add a short second session for it, which makes the split a hybrid without abandoning what you enjoy about it.
Common mistakes
Piling 25 sets onto chest day because it is the only chest session of the week. Training legs once a week and then skipping that session more often than any other. And choosing a bro split as a complete beginner: early progress comes mostly from practising the main lifts, and a full-body or upper-lower programme lets you practise each one two or three times a week instead of once.
Examples
- Monday: Chest, Tuesday: Back, Wednesday: Shoulders
- Each muscle trained once per week
- High volume per session, low frequency
Related Terms
Compound exercises
Put this into practice with exercises from the library.
Common questions
What is Bro Split?
A training split dedicating one day to each muscle group, training each muscle once per week. The bro split assigns one day per week to each muscle group: chest day, back day, leg day, shoulder day, arm day.
What exercises train the Bro Split?
Good options include Atlas Stone Trainer, Atlas Stones, Axle Deadlift, Back Flyes - With Bands, Backward Drag. Each links to a step-by-step guide with demonstration images.
What are examples of Bro Split?
Monday: Chest, Tuesday: Back, Wednesday: Shoulders; Each muscle trained once per week; High volume per session, low frequency.
Put it into practice
12-Week Muscle Building · £29
A 12-week, four-day hypertrophy plan in three phases, with a modest calorie surplus