Split preference.

The split is how strength work is grouped across the week. Set it in Settings → Training inputs → Program shape under your stream’s preferences card.

• Upper / Lower — 4 days/wk · each muscle 2× · simple to recover. Canonical default for hybrid and strength.
• Push / Pull / Legs — 5–6 days/wk · works at higher strength volumes; the high-volume bodybuilding default for hypertrophy.
• Full body — 3 days/wk · every compound (or every muscle group, on hypertrophy) each session. Time-efficient and ideal for low-volume strength weeks.
• Pick for me — the AI picks the best split for your training-days-per-week count.

A common reason to change: your training-days count went up or down in Schedule and the old split no longer fits. The AI won’t force PPL onto a 3-day week — pick something compatible or let it choose. Applies to next week’s plan.