Bro split: a 5-day body-part workout split

A 5 day workout split — often called a bro split — trains one body part a day: chest, back, shoulders, legs and arms, in that order across the week, which lets you use more exercises and total sets per muscle than a plan that shares the same day across two or three muscle groups.

Who this bro split is for

This suits lifters who already have solid technique on the main lifts and can commit to five gym sessions a week, and who prefer training one muscle group hard with several exercises rather than splitting attention across muscles every session. It particularly appeals to people who enjoy bodybuilding-style training and want a dedicated arm day, something a push pull legs split or upper/lower split does not offer directly. If you are newer to lifting, build a foundation with the beginner full-body workout first — a bro split's once-a-week frequency per muscle rewards people who already know how to push a set close to failure safely. If you want each muscle trained twice a week instead of once, the push pull legs split or 4-day muscle-building plan fit that goal better.

How to run the sessions

Warm up 5–8 minutes before every session, then take 1–2 warm-up sets before your first heavy set of the day — a cold heavy bench press, deadlift or squat is a common source of strains. Work through each day's exercises in order: the heaviest compound movement for that muscle group leads (barbell bench press on chest day, deadlift on back day, overhead press on shoulder day, back squat on leg day), with isolation and machine work following once the joint-intensive lifting is done. Follow the weekly order as written — chest, back, shoulders, legs, arms, then two rest days — which spaces chest and back apart by only a day but keeps two full rest days together at the end of the week for overall recovery.

How to choose your starting weight

Because each muscle only gets one session a week on this split, push most sets closer to failure than you would on a higher-frequency plan — aim for 1–2 reps in reserve on your working sets, occasionally taking a last set to failure once you are used to the plan. On isolation moves like lateral raises, cable crossover and hammer curls, chasing a genuine "burn" on the final set is appropriate here in a way it would not be on a heavy compound lift. The RPE and RIR guide explains how to judge how close to failure you actually are.

Week-to-week progression, with numbers

Since each muscle is trained only once a week, progress mainly by adding reps or a small amount of weight to each exercise every week — once you complete every set at the top of the rep range (for example 4×10 on incline dumbbell press or 4×15 on lateral raises), add 1–2.5 kg (2–5 lb) next week. This is the same progressive overload principle used on every other split, just applied with less room for error since a missed week on a bro split means that muscle group waits a full seven days for its next session. Track your numbers for each exercise so you know exactly what to beat the following week.

Adapting the plan: fewer days, home training, missing equipment

Only free 3–4 days: combine two smaller muscle groups per session (for example, shoulders and arms together, or back and biceps as in the back and biceps workout) rather than trying to fit five distinct sessions into fewer days. No cable station at home: swap cable crossover for dumbbell fly and cable kickback for donkey kick or fire hydrant. No barbell: replace the bench press with dumbbell bench press and the deadlift with dumbbell Romanian deadlift. If once-a-week frequency per muscle stops feeling like enough stimulus, the push pull legs split covers the same total volume with twice-weekly frequency instead.

Recovery, sleep and nutrition basics

Because each muscle gets a full week to recover, this split is fairly forgiving on recovery — but the sessions themselves are demanding, since you are pushing close to failure with several exercises per muscle. Sleep 7–9 hours a night and treat the two weekly rest days as necessary, not optional. Eat roughly 1.6 g of protein per kg of body weight a day if muscle building is the goal; if you are also trying to lose fat on this plan, keep the deficit modest so recovery between once-a-week sessions does not suffer. The muscle soreness guide is useful here specifically, since once-a-week muscle frequency often produces more noticeable delayed soreness than higher-frequency plans.

Common mistakes on a bro split

• Going too easy since "there's a whole week to recover": once-a-week frequency only works if each session is genuinely hard. Leaving too many reps in reserve on a bro split under-trains the muscle for the week.
• Skipping a session and losing an entire week of stimulus for that muscle: missing back day, for example, means seven full days pass before your back gets trained again — plan around your schedule to avoid this.
• Copying someone else's exercise list without adjusting weight: the exercises matter less than progressively adding reps or load to your own numbers over time.
• Doing arm day before back and shoulder day in the same week: pre-fatiguing your biceps and triceps can weaken your pulling and pressing strength on the days that follow. Keep the order as written.
• Neglecting warm-up sets because "it's just one exercise focus today": a cold first set on any heavy compound lift carries real injury risk regardless of how the rest of the split is organized.

What to do next

Use the plan builder to combine or split muscle groups differently, and the one-rep max calculator to plan working weights on your main lifts. If once-a-week frequency per muscle stalls your progress after a few months, move to the push pull legs split or upper/lower split for twice-weekly training instead.