A set isn’t (weight, reps, RPE) anymore.
Trackers built for a barbell assume a set is three numbers you type in. That model quietly breaks the moment your equipment starts measuring the work for you.
Your equipment measures more than you type.
A smart trainer records range of motion, bar speed, and power for every rep — and separates the lifting phase from the lowering phase. A flat “weight × reps” row throws all of that away.
Kaatsu isn’t equipment — it’s a condition.
Blood-flow-restriction training has its own settings: pressure, cycle, and limb placement. Stuffing it into a set as a text note loses any way to compare the same movement with it and without it.
Recovery lives in a different app.
Sleep, heart-rate variability, readiness, and bodyweight sit outside your training log — so there’s no honest way to ask how any of them affect what you can do in a session.
Built for training that’s actually measured.
Six things a flat workout log can’t do — because it was never designed for equipment that measures the work for you.
Reads the data your gear records
Per-rep range of motion, velocity, and power — with the lifting and lowering phases shown separately, the way the work actually happened.
Kaatsu as a first-class condition
Track pressure, cycle, and placement, then compare the same movement trained with and without restriction.
Plan and actual, lined up for you
Write a plan, check off your sets, import your workout file. Eccentric matches what you did to what you planned and fills in the real numbers.
Progress per workout, per movement
Trends over time for strength, volume, and per-rep data — with estimated-max tracking for barbell and machine lifters too.
Recovery in the same picture
Bring in sleep, HRV, readiness, and bodyweight, and read your training output right beside how recovered you were.
Coaching without giving up your data
Invite a coach to write your plan without handing over your recovery data. What they can see is always yours to decide.
Four steps, no new habits.
Capture stays where it already happens — on your equipment. Eccentric is everything around it.
Plan it
Author a program yourself, or have a coach write one for you. Self-coached is the default — no setup required.
Train as usual
Lift the way you already do. Your equipment captures the reps; you just check off what you finished.
Bring the data in
Import your workout file. Eccentric matches each set to your plan and fills your session with the real, per-rep numbers.
See what changed
Per-workout progress, per-rep trends, and how your recovery lined up — read honestly, never as false certainty.
Whether you chase the numbers or just want to keep going.
One model, built to stretch from a barbell-only meet prep to a fully wired velocity-based setup.
The powerlifter
Barbell strength and peaking for a meet. Strength and estimated-max tracking that works even with no smart trainer in sight.
The bodybuilder
Volume, RPE, drop sets, eccentric overload, and Kaatsu A/B — all first-class, not notes squeezed into a margin.
The home-gym regular
Simple check-offs, a schedule you can actually keep, and gentle nudges. No spreadsheet required.
The data nerd
Velocity-based training, full recovery context, and your data on tap — export it anytime, or query it from your AI assistant.
Straight answers.
Does Eccentric replace my Voltra or Beyond+?
No. Your equipment and its own app stay the source of capture. Eccentric reads the workout you export and builds the analysis, history, and coaching on top — it’s the layer that piece is missing, not a replacement for it.
Do I need a smart trainer to use it?
No. Barbell, dumbbell, and machine lifters get plans, history, and strength tracking. The per-rep velocity and power features simply light up when you train on a compatible trainer.
What equipment works today?
The Voltra I cable trainer, with Kaatsu modeled as a training condition. The whole thing was built so new equipment can be added without starting the data model over.
Can a coach see my sleep and HRV?
Only if you let them. Writing your plan and seeing your recovery data are separate permissions. A coach you invite gets exactly what you grant — nothing more — and you can change it anytime.
Why is it called Eccentric?
The eccentric is the lowering phase of a rep — where a lot of the adaptation, and a lot of the interesting data, lives. It’s a fitting name for a tool that pays attention to the details most apps ignore.