MettleSense Lean · Athlete Body Intelligence

The scale doesn't
tell the whole story.
Lean explores what may be driving
the change—and when it may resolve.

A research-led body intelligence system that integrates nutrition, training load, glycogen, hydration and recovery signals to interpret short-term weight fluctuations using evidence-informed models. It logs food from natural language, models likely weight movement and tracks recovery patterns against individual physiology and longitudinal data.

Beyond conventional nutrition tracking

Logging what you ate is only half the story.
Lean explores what may explain what happened next.

Generic app says

"You're over your calorie target."

Lean says

"You had 54g added sugar — Sugar Bomb™. Glycogen repletion at 150g × 3g water per gram = ~450g water weight. Estimated resolution window: 3–5 days, depending on subsequent intake, activity and hydration."

Weight Intelligence

Your scale spike has a name.

50g

Sugar Bomb™

Added sugar above 50g/day triggers the Sugar Bomb flag. The mechanism, cited: 150g glycogen repletion × 3g water per gram of glycogen = ~450g water spike on the scale.

Olsson & Saltin, 1970 · Acta Physiologica Scandinavica

AHA warning badge fires earlier — 36g for men, 25g for women. You see the badge before the scale moves. Not after. American Heart Association, 2016 · Circulation

Sugar Bomb

3–5 days

Clean eating resolve window. Added sugar >50g/day.

Carb Spike

3 days

Total carbs >220g, non-sugar-bomb.

Glycogen Reload

2–4 days

+0.3–0.8 kg after a Z3+ training session ≥15 min.

Medication Retention

Per medication

Tracked individually against your medication reference sheet.

Medication Intelligence

Your medication
shows up on the scale.

Some medications cause clinically documented water or weight retention. Lean tracks each individually — with the mechanism, expected magnitude, and the estimated resolution window.

Corticosteroids

Days–weeks

Sodium retention via mineralocorticoid effect. e.g. Prednisone, Dexamethasone. Magnitude scales with dose and duration.

NSAIDs

24–72 hrs

COX inhibition → reduced renal prostaglandin → sodium + water retention. e.g. Ibuprofen, Naproxen.

Antihistamines

24–48 hrs

H1-blockade reduces fluid mobilisation in some users. Mild effect. e.g. Cetirizine, Loratadine.

Hormonal contraceptives

Cyclical

Oestrogen upregulates aldosterone via the RAAS axis → cyclical water retention of 0.5–2 kg.

Recovery Intelligence

Metrics grounded in
sports physiology.

EPOC by zone, ACWR workload ratio, sodium sweat loss, glycogen window — computed from your actual session data, not population estimates. Run 10.25 km, 87 min. Every number cited.

Lean — Workout intelligence: Run 10.25km, EPOC, ACWR 0.99, electrolytes, glycogen

Input

No forms. No dropdowns.
No barcode scanner.

Type: "suji chilla 125g, 2 cups chai, 1 apple" — Lean logs it. One call. Done.

Lean — Macros scorecard: Protein 94.9g, Carbs 153g, Added sugar 0g — every food item broken down by meal

Fuzzy Logic

Levenshtein + SequenceMatcher + Double Metaphone phonetic matching. Typos, regional spellings, phonetic variants — all resolved.

229 Food Aliases

chai→tea · dahi→curd · pohe→poha · badam→almonds · mangoo→mango · penar burj→paneer bhurji.

Daily Pattern Learner

Fires at 06:00 every morning. Hot-item cache resolves your 50 most frequent foods in O(1). The more you log, the faster it gets.

Dual Food Database

IFCT 2017 for every Indian food. USDA FoodData Central for Western foods. No "curry — 200 kcal" placeholders.

Sports Science

Every number has a citation.

EPOC by Zone

Excess post-exercise oxygen consumption

Z1: 3% · Z2: 5% · Z3: 8% · Z4: 10% · Z5: 13% of active kcal.

PubMed 32656951

Recovery Hours

Time until your system clears

Z1/Z2: 12h · Z3: 24h · Z4: 36h · Z5: 48h.

PubMed 30067591

ACWR

Acute:Chronic Workload Ratio

7-day kcal ÷ (28-day kcal ÷ 4). Reference range: 0.8–1.3 · Elevated load: 1.3–1.5 · High load: >1.5.

PMC 7047972

Sodium Intelligence

Electrolyte replacement, auto-calculated

Sweat loss: Z1 300 mg/hr → Z5 800 mg/hr. Pulled from food log. No manual entry.

PMC 6373370

Indian Food Native

Built for how India eats.

Roti. Dal. Rajma. Chole. Paneer bhurji. Suji chilla. Paratha. Curd. Soya nuggets. Papaya. Pistachios. Every item sourced from IFCT 2017. Every macro citation-traceable. No generic Indian food bucket.

Garmin Native

Your zones. Not a population average.

Lean uses your personal Garmin zones, calibrated from your lactate threshold heart rate. Your physiology. Your 12-year data. Every EPOC and recovery calculation reflects that.

The scale doesn'ttell the whole story.Lean explores what may be drivingthe change—and when it may resolve.

Logging what you ate is only half the story.Lean explores what may explain what happened next.