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How the main ways of dividing the body across the week — full-body, upper/lower, push-pull-legs, body-part — trade off per-muscle frequency, session length, and weekly availability.
A "split" is how you allocate muscle groups / movements to sessions across the week. The base system is split-routine; the push/pull logic is push-pull. The four common patterns, compared:
| Split | Typical days/wk | Per-muscle frequency | Session length | Best fit |
|---|---|---|---|---|
| Full-body | 2–4 | every session (~2–4×) | short–moderate, many compounds | beginners; time-limited; high frequency on low days |
| Upper / Lower | 4 (2 upper, 2 lower) | ~2×/week | moderate | intermediate strength & size, balanced |
| Push / Pull / Legs (PPL) | 3 or 6 | 1× (3-day) or 2× (6-day) | moderate | intermediates+; scalable by repeating |
| Body-part ("bro") split | 5–6 | 1×/week | short per muscle, high per-muscle volume | advanced bodybuilders with high MRV |
The trade-off axis: fewer days ⇒ favor full-body (so each muscle still gets trained ~2×); more days ⇒ you can split finer while preserving frequency. Because results track weekly volume and frequency more than the specific split, the best split is the one that fits your available days and lets you hit your weekly volume at ≥~2× frequency per muscle.
Once-weekly body-part splits concentrate huge per-session volume into one shot per muscle, which only advanced lifters with the recovery capacity benefit from; for everyone else, splitting that volume across more sessions is at least as effective.
Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.