EsteBot

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Your fitness coach who's seen every set you've lifted.

It reads your training, sleep, food and weight, and tells you how hard to go and what to lift. Every number comes from its own algorithms, never an AI guess.

A live demo on a made-up athlete, rebuilt every day.

Reviewing this as a portfolio piece? How it was built

EsteBot turns a lifter's workouts, sleep, food and weight into one call a day: built for one athlete, shown here on a made-up one.

Three rules: no personal data in the code repo; every number comes from EsteBot's own tested code, and the AI only explains it; one implementation per metric.

Designed and built by Stephen Sper.

Process, decisions and what broke along the way: HISTORY.md

Looking back · Mon 19 Jan 2026

How should you train today?

71
Go as planned

Nothing that has earned a vote is flagged.

Training loadcontextgood

last 7 days averaged 35 exercise min a day vs 31 over the last 4 weeks (1.14×): within the normal range; 2 rest days in the last 7, with a mix of longer and shorter sessions (monotony 1.6)

Effort (RPE)contextgood

sessions felt RPE 8.5 over the last 7 days vs 8.3 in the 4 weeks before

Sleepvotesgood

7.7 h last night; 6.8 h a night over the last 3 nights vs 6.3 h over the 30 before

HRV & resting HRcontextgood

HRV 42 over the last 7 days vs 42 over the 30 before; resting HR 62 vs 62, same windows

How you feelcontextno data

nothing in your notes for today or yesterday

Nutritioncontextgood

eating 2,073 kcal a day over the last 4 days vs ~2,737 to maintain (4-week trend); protein 177 g a day over the same days vs 161 g target

Weight-loss pacecontextgood

losing 0.60% of body weight a week (last 4 weeks vs the 4 before): not fast enough to cost recovery (above 1% a week); this checks too fast, not too slow

i

Only areas with a record vote: an area votes once your sessions on its flagged days have gone worse than on its clear days (see Is the call working?). The rest are shown as context. Take it easy with one voting area in strain or two to watch, rest with two in strain. Going hard needs a reason that has itself gone with better sessions, never just nothing flagged. A safety rule (a health note, or coming back from a near-idle stretch) makes it a take-it-easy day whatever the record says. The score sits inside the call's band (rest 0–24, take it easy 25–49, as planned 50–74, go hard 75–100), higher the more areas are clear.

Today's session

Pull B · Barbell Deadlift
i

Next in your push → pull → legs rotation after push on Sat 17 Jan. Exercises from your last Pull B (Sat 10 Jan); each target comes from the last time you did that exercise.

One rule for every exercise, applied to its last session. Strength work (top set of 5 or fewer): RPE 8 or under adds load, 8.5–9 adds a rep. Accessories: add a rep up to 12 (15 for calves, laterals, shrugs, face pulls, leg extensions, flyes), then add load and drop to the bottom of the range. Bodyweight: beat the last total reps by 1–2. Any top set at RPE 9.5+: hold the load and make it cleaner. No RPE logged: repeat it. A hold day repeats every load; a sore back drops the spine-loading lifts.

ExerciseTodayWhyLast time
Barbell Deadlift 305 × 5
add load
top set 295 × 5 at RPE 7.5 295 × 5, 295 × 5, 295 × 5 · Sat 10 Jan
Pull-Up 3 sets, 15–16 reps in total
add reps
last time 3 sets, 14 reps, hardest RPE 9 6, 5, 3 · Sat 10 Jan
Barbell Curl 85 × 9
add a rep
top set 85 × 8 at RPE 9 85 × 9, 85 × 8, 85 × 8 · Sat 10 Jan
Dumbbell Row 85 × 10
add a rep
top set 85 × 9 at RPE 8 85 × 10, 85 × 10, 85 × 9 · Sat 10 Jan