Your week
Only 4 days available? Run Push A, Pull A, Legs A, then Push B/Pull B/Legs B on the following week days you can make. Keep at least one rest day between leg days.
Built for a 37-year-old lifter on the comeback
Six short, focused sessions a week. Every muscle trained twice. Muscle up, lean out, tighten up, without wrecking joints that haven't seen a barbell in years.
Only 4 days available? Run Push A, Pull A, Legs A, then Push B/Pull B/Legs B on the following week days you can make. Keep at least one rest day between leg days.