The programming engine — built for powerbuilders
The programming brain
for your lifts.
LiftingLabs decides what you should lift next — autoregulating from your RPE, tracking volume against MEV/MAV/MRV, and keeping every prescription auditable. Your logging app just records it.
Free while we build · No credit card · ~3 minute setup
What it is
A programming engine, not another logger.
Hevy already wins the “what did I just lift” problem. LiftingLabs answers the one nobody else does: what should I lift next, and why? Keep logging wherever you already log. We pull it in, do the math, and tell you the answer.
What it is not
Not a workout tracker. Not generic-AI fitness.
No streaks. No leaderboards. No badges. No nutrition tracker. Built for one job: the programming math a $300/month coach charges you to do, delivered by software that never silently changes your numbers without telling you why.
Six things the engine does
Every prescription, traceable to a rule.
%1RM with auto-updating training maxes
Top sets are prescribed against your TM. Hit an AMRAP that implies a new max and the TM auto-bumps — every downstream percentage re-resolves. No manual max editing.
RPE autoregulation, live
Report the actual RPE on your top set. The engine back-solves day-of strength via the Tuchscherer table and re-prescribes your back-offs to reflect today, not last week.
MEV / MAV / MRV per muscle
Thirteen muscle groups, RP-style landmarks, weekly hard-set counting with direct + indirect attribution. The dashboard tells you exactly how many sets you have left before MRV.
Prilepin guardrails
Out-of-range main-lift schemes get flagged before you waste a session. 8×3 @ 90%? "Above productive range — fix it?"
Auto-detected deloads
RPE creep, performance regression, MRV breach, low-readiness — five evidence-based triggers. The engine suggests a deload and explains exactly why.
Powerbuilding periodization
Concurrent strength + hypertrophy across the same block. A shared fatigue ledger debits accessory volume after heavy main-lift days so you can build the total AND the physique.
- Wendler 5/3/1main-lift TM scheme
- RTS · TuchschererRPE → %1RM table
- RP volume landmarksMEV / MAV / MRV per muscle
- Prilepinintensity-band reps guardrail
- SBS · Nuckolsevidence base for everything else
Currently in development
Free. Every feature. While we build.
The engine, the dashboards, custom programs, the importer — all unlocked. Help us shape the product. No payment, no card, no upgrade gates.
We'll walk you through setup in about 3 minutes.