Workout Split Methodology

The rules behind the Split Finder, explained so you can judge them for yourself.

How we define a split

Each split in SplitsWorkout records how many days it takes, what each day trains, how often each muscle is trained per week, a typical session length, a difficulty level and example exercises. The standard versions are push pull legs, upper/lower, full body, the bro (body-part) split and the Arnold split.

How the Split Finder ranks splits

The finder is rules-based: no AI model is involved and nothing is sent to a server. It scores each split against your seven answers:

  1. Training days (largest weight). Every split has an ideal, workable or stretch range of days; splits that do not suit your days are excluded.
  2. Experience. Simpler, higher-frequency plans score better for beginners; high-volume plans score better for advanced lifters.
  3. Goal. Muscle gain, strength, fat loss and general fitness each favour different structures.
  4. Session length, preference and recovery adjust the ranking, for example favouring shorter sessions or dedicated muscle-group days.
  5. Equipment nudges the ranking and adds a note, since body-part days rely more on machines and cables.

Every recommendation lists the reasons it scored well and any cautions. We show tiers (best fit, strong alternative, also workable) rather than percentage scores, because a percentage would suggest precision these rules do not have.

Why we cap training at six days

If you choose seven days, the finder schedules six training days and one rest day. Hard training every day leaves no recovery window, and recovery is where adaptation happens.

Principles behind the advice

Our advice follows widely accepted resistance-training principles: train each muscle regularly, keep total weekly volume sensible, progress gradually and recover adequately. Where evidence is mixed — for example, the best training frequency — we say so rather than pretending there is one right answer.

Limits

The finder cannot see your injuries, history, schedule changes or recovery. Treat results as a starting point to try for 8–12 weeks, not a prescription. Try it on the Split Finder or read the best workout split guide.