5/3/1 Triumvirate vs Boring But Big: Which Template to Run

Same engine, different back half

Every 5/3/1 session opens the same way: three ascending work sets of the day's main lift, calculated from your Training Max, the last one an AMRAP. Templates differ in what fills the rest of the session. Boring But Big fills it with 5x10 of the lift you just trained; the Triumvirate fills it with exactly two assistance exercises for 5 sets each - dips and chin-ups after pressing, good mornings and leg raises after deadlifts, and so on. Because the main work, TM increments and week-4 deload are identical, this is a choice about supplemental volume, not about the program.

Triumvirate vs BBB: the spec side by side

When the Triumvirate is the right call

Pick the Triumvirate when you want the 5/3/1 strength progression with a sane, balanced back half. It shines when recovery is the limiting factor - a physical job, poor sleep, a calorie deficit, or an older lifter's joints - because the assistance work adds muscle without the systemic hit of fifty more barbell reps. It also quietly fixes the holes a four-barbell-lift program leaves: every week includes vertical pulling, rowing, direct hamstring and ab work. And it is fast; three exercises per day keeps sessions under an hour, which is the difference between running a program and abandoning it.

When BBB is the right call

Pick BBB when the goal on the wall is size. Fifty extra reps of the main lifts at 50% TM is a bigger hypertrophy stimulus than any accessory pairing, and it doubles as skill practice - a hundred submaximal squats a month grooves technique in a way leg presses cannot. The price is recovery: BBB deadlift and squat days are famous for a reason, and the template punishes a lifter who is cutting calories or sleeping five hours. If you run BBB, respect the 50% starting weight and eat like the program demands. The full comparison of BBB against its other rival is in BBB vs First Set Last.

Switching between them, and the hybrid

• Templates are modular: the main 5/3/1 work and TM progression never change, so you can swap Triumvirate for BBB between any two cycles with zero transition cost.
• A classic rotation is 2-3 BBB cycles while building, then Triumvirate cycles while cutting or when life gets busy.
• The community hybrid "Boring But Triumvirate" caps the idea of both: the main lift, then 5x10 of the same lift at 50% TM as one of the two assistance slots, then a single accessory. It works, but it inherits BBB's recovery bill - treat it as BBB with better pulling coverage, not as a Triumvirate variant.
• Whichever you run, commit for the full 4-week cycle. Judging a template on one hard week tells you nothing.