by Jim Wendler
Boring But Big pairs the canonical 5/3/1 main work with 5×10 BBB sets at 50-70% of training max. Heavy strength plus real volume, four days a week.
Create your account, then pick 5/3/1 Boring But Big from the program library.
Frequency
4× / week
Length
4 weeks
Difficulty
intermediate
Progression
percentage
Each session: warm up the main lift, hit the 5/3/1 sets, then 5×10 BBB at percentage. Optional accessory work after.
The program progresses by training max, which increases every 3-week cycle, with a deload in week 4.
Be clear on what RepRoute does and doesn't do here, because it matters for a percentage-based program: RepRoute does NOT store or advance a training max for you. There is no training-max field anywhere in the app. It ships the program's structure, tracks every set you log, detects PRs, and adapts exercises to your equipment and injuries — but the percentage math and the TM bumps are yours to run, the way you would on paper.
Pros
Trade-offs
Day 1
Day 2
Day 3
Day 4
No. There's no training max stored anywhere in the app, so it can't advance one for you or calculate your percentages. You bring your TM and the weights it implies; RepRoute runs the structure and logs the work.
It's late-novice or intermediate. Beginners get more out of GZCLP or Greyskull LP first.
Yes — BBB is most effective around 50-60% TM for a hypertrophy emphasis. The volume is the point, not the load.
Free plan, no credit card. Sign up, pick 5/3/1 Boring But Big from the program library, and it ships as authored — adaptations kick in only when you flag an injury or a piece of kit you don't have.
