Boring But Strong Calculator

Enter your lifts and get a complete 5/3/1 Boring But Strong cycle - 5s PRO main sets, 10×5 supplemental work and assistance, with every weight calculated.

Your lifts

Weight × reps of a recent hard set for each lift.

Training max

Run Boring But Strong in the 531 Tracker app

The app generates the same BBS cycle, pre-fills every 10×5 weight, logs your sets with a rest timer and bumps your training maxes when the cycle ends - which matters when you have fifty heavy reps to count. Works offline, no account needed.

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What is Boring But Strong?

Boring But Strong (BBS) is the heavy-volume 5/3/1 template. After the day's main sets you do ten sets of five of the same lift at the First Set Last weight - 65%, 70% or 75% of your training max depending on the week. Fifty reps, the same as Boring But Big, but at a weight fifteen to twenty-five percentage points heavier and in sets of five instead of ten.

That change is the whole point. Sets of five at 65-75% are strength work, not hypertrophy work: the bar speed stays high, the technique stays tight, and you accumulate a great deal of quality practice under a moderate load. It is run four days a week, one main lift per day, and it is meant to be paired with 5s PRO on the main sets - straight fives, no AMRAP - because nobody has an all-out set in them before 10×5.

The calculator above builds the whole cycle with 5s PRO selected by default. Enter a recent hard set for each lift and every weight is worked out and rounded to what you can load.

Why 5s PRO, not PR sets

With PR sets the last main set is an AMRAP, and a proper AMRAP at 85-95% leaves you with nothing for ten sets afterwards - or the 10×5 gets done badly, which defeats its purpose. 5s PRO makes every main set a controlled five, so the main work becomes a heavy warm-up for the supplemental sets rather than a competition with them.

The calculator lets you switch to PR sets if you want, and some lifters run BBS that way at 65% only. Most should not. If you want AMRAP sets, run BBS as a two-cycle leader with 5s PRO and then chase rep records in an anchor cycle of First Set Last with PR sets.

BBS or BBB?

Both are fifty supplemental reps of the main lift, four days a week. The difference is what the reps are for.

  • Boring But Big - 5×10 at 50-70%. Sets of ten at a light weight build muscle and work capacity. Easier on the joints, harder on the lungs.
  • Boring But Strong - 10×5 at 65-75%. Sets of five at a moderate weight build strength and technique. Easier on the lungs, harder on recovery, because the total tonnage is much higher.

If your goal is to add weight to the bar and your technique benefits from practice, BBS. If your goal is size, BBB. Many lifters alternate: a BBB block, then a BBS block, with an FSL anchor after each.

Training max and recovery

BBS is the template where the training max matters most. At 85% of your true max the 10×5 in week 3 is 75% of that - about 64% of your real one-rep max, for fifty reps after three heavy sets. At a 90% training max the same sets are noticeably harder and the third week becomes a grind. Use 85%, and do not be embarrassed to use 80%.

Rest between the 10×5 sets is longer than on BBB - ninety seconds to two minutes is normal, and the sessions run long. Eat accordingly. This is not a template for a calorie deficit, and it is not one to run for more than two cycles in a row.

Assistance and conditioning

Keep assistance small. The calculator gives you two movements a day at 5×10 - pulling, core and posterior-chain work - and if the 10×5 is crushing you, halve that. Nothing that competes with the main lifts for recovery: no heavy rows, no extra pressing.

Conditioning should be easy and short while you run BBS. Walking, sled drags, an easy bike. Save the hard conditioning for the anchor cycle.

Who BBS is for

Lifters with a year or more of 5/3/1 behind them who want a strength-focused leader. It suits people whose lifts are held back by technique or by a lack of practice at moderate loads - typically the squat and deadlift - and it suits anyone who finds sets of ten mind-numbing and would rather do sets of five.

It is not for beginners, not for anyone dieting, and not a template to run for the long term. Two cycles, deload, then an anchor with less volume and PR sets. Then decide whether to run it again.

Common mistakes

  1. Running it with PR sets. Use 5s PRO. The AMRAP set and 10×5 cannot both be done well in the same session.
  2. Training max too high. More than on any other template, a 90% training max turns BBS into a grind by week 3. Use 85% or lower.
  3. Running it as an anchor. BBS is a leader. It builds a base of strength for a lower-volume cycle to cash in; it is not the cycle where you set rep records.
  4. Doing it on a deficit. The tonnage is very high. If you are dieting, run First Set Last instead.
  5. More than two cycles. The volume stops paying off and starts costing you. Deload and move on.

Questions about Boring But Strong

What percentage is Boring But Strong?

The First Set Last weight for that week: 65% of your training max in the 5s week, 70% in the 3s week and 75% in the 5/3/1 week, for ten sets of five. With the 3/5/1 week order the first two weeks swap, so it is 70% then 65%.

Should I use 5s PRO or PR sets with BBS?

5s PRO - every main set a straight five, no AMRAP. That is how BBS is meant to be run and it is what the calculator defaults to. An all-out AMRAP set followed by 10×5 is too much; if you want rep records, run BBS as a leader and take the PR sets in the following anchor cycle.

Boring But Strong or Boring But Big?

BBS for strength and technique - 10×5 at 65-75%. BBB for size and work capacity - 5×10 at 50-70%. Same number of supplemental reps, but BBS is heavier and much harder to recover from. If in doubt, run BBB first; it is the more forgiving of the two.

How long should I run BBS?

Two cycles, then a deload and an anchor cycle with less volume and PR sets - First Set Last is the usual choice. Running BBS for a third cycle in a row is possible but rarely worth it; the fatigue catches up with you.

What training max should I use for BBS?

85% of your estimated one-rep max, or 80% if you are new to the template or coming off a layoff. BBS punishes a high training max more than any other 5/3/1 template because the week 3 sets are done at 75% of it, fifty times, after heavy main work.

How long should I rest between the 10×5 sets?

Ninety seconds to two minutes. These are not the light sets of BBB - the weight is meaningful and you want every rep fast and clean. Expect the sessions to take longer than other 5/3/1 templates.

Is BBS good for cutting?

No. The total tonnage is the highest of any standard 5/3/1 template, and recovery on a deficit will not keep up. Run First Set Last or a 5s PRO cycle instead while dieting and come back to BBS when you are eating for it.

Can I do BBS with a different lift, like BBB's opposite-lift option?

The standard version is the same lift, and that is what the calculator generates - the point is fifty quality reps of the lift you are trying to improve. Some lifters use the opposite lift for the deadlift day only, doing 10×5 squats instead, to spare their lower back. That is a reasonable modification if deadlift day is the one you cannot recover from.

Does the calculator include the deload week?

Yes. The cycle is three working weeks, and a deload week at 40%, 50% and 60% for sets of five on the main lifts is shown separately. After two cycles of BBS you need it - do not skip it, and drop the 10×5 that week.

Other 5/3/1 templates