5/3/1 Boring But Big: The Complete Guide

How 5/3/1 BBB works

Everything in 5/3/1 is built on a training max — 90% of your true one-rep max. Every percentage below is a percentage of that TM, not your actual max, and that gap is what keeps the program honest and progressing. Before you do anything else, set your training maxes with the training max calculator.

You train four days a week, one main lift per day: overhead press, deadlift, bench press, and squat. Each lift runs on a rolling four-week cycle, and the last prescribed set of every heavy day is an AMRAP — the "+" — where you do the listed reps as a minimum and then push for as many more as you can manage in good form.

The four-week main-work cycle

Each week has three main sets per lift, all off the training max:

Week 1 (5s): 5 @ 65%, 5 @ 75%, 5+ @ 85%.
Week 2 (3s): 3 @ 70%, 3 @ 80%, 3+ @ 90%.
Week 3 (5/3/1): 5 @ 75%, 3 @ 85%, 1+ @ 95%.
Week 4 (deload): 5 @ 40%, 5 @ 50%, 5 @ 60% — no AMRAP, just easy technique work to recover.

The AMRAP set is the heart of it. On week 1 that 85% set might be five prescribed reps but eight or nine real ones on a good day; those extra reps are your progress signal and your rep-record chase. Keep your form strict as the sets get heavy — review the squat, deadlift, and overhead press guides so a long AMRAP set doesn't turn into a technique breakdown.

The BBB volume: 5×10

After the heavy main work, Boring But Big adds the growth stimulus: five sets of ten at 50–60% of your training max. You can run the 5×10 on the same lift you just trained heavy, or on its opposite (squats after a deadlift day, bench after an overhead day). Fifty reps at moderate load is deceptively hard — start at 50% and earn your way up. This volume is where the "big" in Boring But Big comes from.

Progression: climb the training max, not the bar

You don't add weight session to session here. Instead, after each complete four-week cycle you bump your training maxes: +5 lb to the upper-body lifts (bench, overhead press) and +10 lb to the lower-body lifts (squat, deadlift). Because every working weight is a percentage of the TM, raising the TM raises the whole cycle. It's a slower climb than adding 5 lb every workout, but it's one you can sustain for years.

The AMRAP sets tell you whether your training maxes are set right. If your rep counts are healthy and climbing cycle to cycle, keep going. If they're collapsing to the bare minimum, your TM got ahead of you — reset it to about 90% of a fresh estimate. Sanity-check that estimate against a big AMRAP set with the 1RM calculator.

Common mistakes

Setting the training max too high

The number-one 5/3/1 error. People plug in their true max instead of 90% of it, blow through the first cycle, then fail the AMRAP sets. Start conservative — you should finish early cycles wanting more, not scraping the minimum reps.

Going too heavy on the 5×10

The BBB work is meant to be manageable volume, not another max effort. Load it at 50% and only creep up when you're recovering cleanly. If your main-lift AMRAP reps drop the week after a hard 5×10, the volume weight is too high.

Skipping the deload

Week 4 looks pointless when you feel strong, so people cut it. Don't. The deload is what lets the following cycle's heavier training maxes feel light. Skipping it borrows recovery you'll pay back with interest.

Not pushing the AMRAP

Stopping at the prescribed reps throws away the program's whole feedback mechanism and most of its stimulus. When the "+" set is fresh, chase reps — stopping one shy of a form breakdown, not five reps early.

Who it's for

5/3/1 BBB is for lifters who've exhausted linear progression and want both strength and size. If you've been resetting the same lifts on StrongLifts 5×5, Starting Strength, or Greyskull LP and the weight just won't move session to session, this is the natural next step: a proven, percentage-based plan that trades fast jumps for a climb you can ride for years. Set your training maxes with the training max calculator before your first cycle.

FAQ