Train on
stimulus.
Not tonnage.
Liftium reads every set (load, reps, and how close you got to failure) and turns it into Effective Sets: a real measure of growth stimulus, adjusted for how recovered the muscle actually was. Progress you can see. Fatigue you can't ignore.
- Logs
- Load · Reps · RIR
- Reads
- Effective sets
- Output
- Weekly read
Tools built for the work,
not the feed
Log accurately. Read your real stimulus. Adjust before you stall.
Effective Sets
Not every set grows muscle equally. Liftium weighs each set by effort (RIR), load, and how recovered the muscle was, so you see the stimulus that actually counts, not just the number of sets you did.
Recovery & Readiness
Every muscle gets a live recovery score and a "ready in Xh" estimate, factoring in local fatigue and whole-body systemic load. Train what's recovered. Stop guessing whether it's a rest day.
Your AI Coach
Coach-style reads on your actual sessions: which muscles are undertrained, where fatigue is piling up, what to push next. It cites your real numbers, skips the empty praise, and doesn't pull routines off the internet.
Volume, on Target
Weekly effective-set volume per muscle against an evidence-based range. Green when you're in the zone, amber when you're short, red past the point of returns. Twelve-plus muscle groups, week over week.
Progress & PRs
Estimated 1RM, max load, and max volume tracked per exercise across your whole history, so real progression is obvious, not buried in raw logs. Coming back from a layoff? Comeback Mode rebaselines your PRs from the day you restarted.
A Library That Stays Clean
200+ exercises with muscle attribution built in. Build custom movements or variants, and they inherit muscle data automatically, so a close-grip tweak never fragments the progress you've already banked.
From first set to weekly read
From your first workout to long-term progression, without changing how you train.
- 01
Log as you lift
Weight, reps, and RIR per set. No setup flows, no questionnaires. A live timer, a rest clock, and per-muscle stimulus updating as you go.
- 02
Keep exercises consistent
Use the built-in library or spin up your own variations. New movements inherit muscle data automatically, with the option to fine-tune when it matters.
- 03
See what's actually driving progress
Liftium organizes every set into effective-set volume, effort distribution, and recovery trends, so progression patterns surface without you digging.
- 04
Get the weekly read
A coach-style summary of the week: what progressed, what stalled, which muscles are under- or over-cooked, and where to point next week.
Built on how muscle
actually grows
Liftium's model runs on hypertrophy fundamentals (proximity to failure, effective volume, and recovery), not influencer splits. Effort is measured in Reps in Reserve. Stimulus is discounted when a muscle isn't recovered. Systemic fatigue decays over days, which is exactly why your rest days matter.
- Effort
- Reps in Reserve
- Stimulus
- Discounted when unrecovered
- Fatigue
- Systemic, decays over days
Read the research it's built on: curated studies on hypertrophy, recovery, and technique. Every study, broken down three ways.
- 01What it says
The finding, in plain terms.
- 02Its limitations
Where the evidence stops short.
- 03How it maps
What it changes in your training.
Start logging
with intent
See your training organized around stimulus, recovery, and consistency, from the very first set.