The best workout split for 2, 3, 4, 5 or 6 days a week

The rules the list follows

• Twice a week per muscle. A 2016 meta-analysis found training each muscle twice a week produced more growth than once. A 2019 follow-up found that once weekly volume is equated, frequency makes little difference, so the point of a higher frequency is to fit more quality sets into the week, not frequency for its own sake.
• Enough weekly sets. A dose-response meta-analysis found ten or more hard sets per muscle per week produced more growth than fewer. A sensible range is 8–14 weekly sets per muscle for beginners, 10–18 for intermediates and 12–20 for advanced lifters, counting sets taken within a few reps of failure.
• Strength follows volume too. A meta-analysis on strength found no significant effect of frequency when volume was equated, with a modest edge for higher frequency on upper-body lifts.
• The best split is the one you keep. Two days every week beats five days for a month and then none. Pick the frequency from your calendar, not from your ambition.

Days a week	Split	Each muscle trained	Typical session length	Suits
2	Full body	2×	50–60 min	Beginners, busy people, runners who lift
3	Full body	3×	45–60 min	Most people; the default
4	Upper / lower	2×	45–60 min	Intermediates wanting more sets per muscle
5	Upper / lower + full body	2–3×	40–55 min	Experienced lifters with time
6	Push / pull / legs, twice	2×	40–50 min	Advanced lifters who enjoy training daily

1. Two days a week: full body

Two full-body sessions hit everything twice with no juggling. Each session is a squat pattern, a hinge, a horizontal press, a vertical pull and one or two accessories, three to four sets each.

• Day A: squat, bench press, row, Romanian deadlift, side raises.
• Day B: deadlift, overhead press, pull-ups or pulldowns, split squats, curls.

Weekly sets per muscle land around 6–10, at the low end of effective, so every set should be hard (one to three reps in reserve). It is the right split for a first three months, for anyone whose week only has two gaps, and for runners whose other days are spoken for. The 3-day full-body plan is this split with one more day.

2. Three days a week: full body

Three full-body sessions is the best-supported default for most people: three exposures a week per muscle, 9–14 weekly sets, and a missed day costs you a third of a week rather than a whole body part. Rotate the compound lifts across the three days (A/B/C) so the same muscles are not pounded identically each time, and keep sessions under an hour.

• Day A: squat, bench, row, plus hamstrings and rear delts.
• Day B: deadlift, overhead press, pulldown, plus quads and arms.
• Day C: front squat or leg press, incline press, chest-supported row, plus calves and core.

Beginners should use fixed rep targets and add weight whenever every rep is hit; progressive overload explained has the increments.

3. Four days a week: upper/lower

Upper/lower splits the body in half and trains each half twice: upper Monday and Thursday, lower Tuesday and Friday, or whatever four days you have. Each session has room for six to seven exercises, which lifts weekly sets per muscle to 12–16 without sessions running long. This is where most intermediates end up.

• Upper 1 (strength bias): bench press, row, overhead press, pull-ups, triceps, biceps.
• Lower 1 (strength bias): squat, Romanian deadlift, leg press, leg curl, calves.
• Upper 2 (volume bias): incline dumbbell press, cable row, lateral raise, pulldown, arms.
• Lower 2 (volume bias): deadlift, front squat or hack squat, lunges, leg extension, core.

4. Five days a week: upper/lower plus a full-body day

Five days is awkward for traditional splits, which is why five-day programmes drift into a body-part day for whatever the lifter likes most. A cleaner structure is the four-day upper/lower above plus a fifth full-body session that doubles as a place for weak points: a third exposure for the muscles that lag, 14–18 weekly sets for the ones you emphasise. Keep the fifth day lighter and shorter so the week recovers.

5. Six days a week: push/pull/legs, twice

Push (chest, shoulders, triceps), pull (back, biceps) and legs, repeated twice, gives every muscle two sessions a week and the most room for sets of any split, 16–20 per muscle. It is the advanced option: six gym days is a lot of recovery to manage, sessions should be short (40–50 minutes), and the second pass through the week should be lighter or use different exercises. If you are not already an experienced lifter, you will progress at least as well on four days.

Splits to avoid, and why

• The one-muscle-a-day "bro split" trains each muscle once a week, which the frequency research consistently finds inferior at the same volume. It can work for advanced lifters with very high per-session volume, but it is a poor default.
• A five-day split with no rest between legs and a heavy pull day. Deadlifts the day after squats is the most common way five-day programmes fall apart.
• Any split you cannot sustain for twelve weeks. Changing programmes every three weeks means never learning whether one works. Pick, run it for a block, then take a deload week and run it again.

How Bay picks a split

When you ask Bay to "design me a plan", the split comes from your days, by these rules: one or two days is full body, three is full body, four is upper/lower, five is upper/lower plus a full-body day, six is push/pull/legs twice, so every major muscle is trained at least twice a week whatever you pick. Weekly hard sets per muscle are placed in the 8–14, 10–18 or 12–20 band by your experience, rep ranges follow your goal, and if your minutes are tight, isolation work is trimmed before the compound lifts. Exercises come from what you have (a full gym, a barbell at home, dumbbells only, or nothing), with substitutions for anything that hurts. Then each morning's text carries the session with the weight for every lift, and progression is handled by rule. The full set of rules is in how to build a personalized workout routine; the dumbbell-only plan is what the three-day version looks like at home. Bay is free right now, over iMessage, RCS or SMS.