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What is Training split?
A training split is simply the answer to "what do I train on which day?" Every program needs one — even training your whole body every session (a full-body split) is a choice of split, just as much as dedicating separate days to chest, back, and legs (a bro split). The right split isn't about which one is objectively best; it's about which pattern lets you hit each muscle group often enough, with enough quality volume, given how many days you can actually show up.
How it works
A split works by spreading your weekly training volume across sessions so no single workout is too long or too fatiguing, while making sure each muscle group gets trained often enough to keep adapting. Research on training frequency shows that hitting a muscle group at least twice per week tends to produce better hypertrophy than once per week, when total weekly volume is matched — which is why splits that repeat each muscle group 2x/week (full-body, upper-lower, PPL run 5-6 days) have become more popular than the classic once-a-week bro split. The split you choose mostly changes how that frequency and volume gets distributed across your available days, not whether hard work still has to happen.
Types
Full-body
Trains most major muscle groups every session, usually 3x/week — highest frequency per muscle, lowest per-session volume.
Upper/lower
Alternates upper-body and lower-body days, typically 4x/week — a strong middle ground of frequency and session length.
Push/pull/legs (PPL)
Splits by movement pattern; run 3, 5, or 6 days per week depending on how much frequency you want per muscle.
Bro split / body-part split
One or two muscle groups per day across 5-6 days — highest single-session volume, lowest per-muscle frequency (once/week).
Worked example
Say you can train 4 days a week and want to hit each muscle group roughly twice. Here's how an upper/lower split fills that schedule.
| Day | Focus | Frequency per muscle group |
|---|---|---|
| Mon | Upper body | 1st hit |
| Tue | Lower body | 1st hit |
| Wed | Rest | — |
| Thu | Upper body | 2nd hit |
| Fri | Lower body | 2nd hit |
Every muscle group gets trained twice across the week using just 4 sessions — the same weekly volume spread over a 6-day PPL would need two more training days for the same frequency.
Training split vs training frequency
| Training split | Training frequency | |
|---|---|---|
| What it describes | The structure — which muscles/movements on which day | How many times per week a muscle group is trained |
| Set by | How many days a week you can train | The split you choose, plus how you rotate it |
| Relationship | The framework | An outcome of that framework |
Two different splits can produce the same frequency — a 3-day full-body split and a 6-day PPL both train each muscle twice a week.
By goal
- Beginners (2-3 days/week): A full-body split makes the most of limited training days by hitting every muscle group each session.
- Intermediate lifters (4 days/week): Upper/lower is a strong default — enough frequency per muscle without overly long sessions.
- Advanced lifters (5-6 days/week): PPL or PPLUL splits allow more total volume per muscle group while still hitting each one 1.5-2x/week.
Common misconceptions
- "One split is objectively the best for muscle growth." When weekly volume and frequency are matched, well-designed full-body, upper-lower, and PPL splits produce comparable results — the best split is the one that fits your schedule and recovery.
- "A bro split (once-a-week muscle training) is outdated and useless." It can still work, especially at high per-session volume, but research generally favors training each muscle group at least twice a week when volume is equal.
- "You have to pick one split and never change it." Splits are commonly rotated across training blocks — many lifters run upper/lower in the off-season and shift to a higher-frequency PPL when they can add training days.
Related terms
Training split FAQ
What is the best training split for beginners?
A full-body split trained 3 days a week is usually best for beginners — it maximizes frequency per muscle group and fits well within a lower weekly training-day count.
How many days a week do I need for a training split?
Anywhere from 2 to 6 days can work. Full-body suits 2-3 days, upper/lower suits 4 days, and push-pull-legs suits 3, 5, or 6 days depending on how it's run.
Is push-pull-legs better than a bro split?
PPL generally trains each muscle group more often per week, which research links to better hypertrophy at matched volume. A bro split can still work well, especially with high per-session volume.
Can I switch training splits without losing progress?
Yes — switching splits between training blocks is common and won't cost you progress as long as weekly volume and frequency per muscle group stay similar.
Does the training split matter more than total volume?
No — total weekly volume and progressive overload are the primary drivers of results. The split mainly determines how that volume gets distributed across your available days.
References
- Schoenfeld BJ, Grgic J, Krieger J. How many times per week should a muscle be trained to maximize muscle hypertrophy? A systematic review and meta-analysis. J Sports Sci, 2019. PubMed 30558493
- The 6 best workout splits to build muscle & strength. StrengthLog
- The best PPLUL split for building muscle & strength. StrengthLog
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