03 · WELLEX VITALITY INDEX (WVI)
Version: 6.0 | Date: 12.03.2026 | Status: Canonical Category: Protocol SSOT for: WVI formula, biometric components, yield tier table Dependencies: 06_YIELD_PROTOCOL (yield), 04_APP_UX (display), 25_TECH_REQUIREMENTS (specs)
TL;DR
- WVI = daily score 0–100 from 3 biometric components: Emotional (35%) + Recovery (35%) + Physical (30%)
- WVI determines Target Yield: 0–20%/month (0% at WVI 0–39, up to 20% at WVI 90–100)
- Calibration period (Day 1–7): WVI = 50 neutral, yield = 5%/month fixed
Purpose & Scope
This document defines the WVI methodology — the scientific and algorithmic core of Wellex. It covers the formula, components, 11-emotion detection, anti-cheat, edge cases, and the canonical WVI→Yield table. For yield mechanics see 06_YIELD_PROTOCOL. For UX display see 04_APP_UX and 05_DASHBOARD.
1. Definition
Wellex Vitality Index (WVI) — a proprietary daily health score (0–100) calculated from continuous Wellex Band biometric data. WVI is the "hash rate" of Emotional Mining: higher WVI → higher Target Yield allocation.
WVI in the dual-platform architecture:
| Platform | WVI Display |
|---|---|
| APP | Full detail: WVI 0–100, 3 components, graphs, trends, AI recommendations |
| WEB | WVI widget + yield $ calculation, income projector |
APP shows only yield %. WEB shows full financial detail.
2. Formula
WVI_daily = E_score × 0.35 + R_score × 0.35 + P_score × 0.30
WVI_monthly = Σ(WVI_daily) / N_days_in_month
All sub-scores normalized 0–100. Age correction via rolling 90-day personalized baseline. Days without bracelet: WVI_daily = 0 (see Grace Days exception below).
Grace Days: 3 days/month where WVI_daily = rolling 7-day average of active days (no zero penalty). User sees: "📅 Grace Day used (2 of 3 remaining)."
WVI Floor for stakers: minimum WVI = 25 for users with active staking. Even at zero wearing → yield allocation = 0% (no punishment, just no bonus).
3. Component 1 — Emotional State (35%)
The emotional component is Wellex's unique differentiator and the core of Emotional Mining.
Key metrics: ▸ HRV (RMSSD, LF/HF ratio, pNN50) ▸ EDA — skin conductance level (SCL) and spontaneous response peaks (SCR) ▸ Resting heart rate and variability
Detection algorithm: multi-class LSTM + attention neural network. Input: HRV time-series + EDA + accelerometer. Output: probability distribution across 11 emotions.
11 emotions — detection methodology:
| # | Emotion | HRV Pattern | EDA Pattern | Confidence |
|---|---|---|---|---|
| 1 | Calm | High RMSSD, low LF/HF | Low SCL, rare SCR | 95% |
| 2 | Joy | Moderate RMSSD ↑, HF dominant | Moderate SCL ↑ | 88% |
| 3 | Excitement | Low RMSSD, high LF | High SCR frequency | 90% |
| 4 | Acute Stress | Very low RMSSD, LF/HF > 4 | SCL spike + frequent SCR | 93% |
| 5 | Chronic Stress | Sustained low RMSSD (> 2h) | Elevated baseline SCL | 85% |
| 6 | Anxiety | Low HF, irregular RR | Elevated SCL, spontaneous SCR | 82% |
| 7 | Focus | Moderate RMSSD, stable RR | Gradual SCL rise | 80% |
| 8 | Fatigue | Declining RMSSD trend | Flattened EDA response | 87% |
| 9 | Arousal | High HR, low RMSSD, high LF | SCR burst > 10/min | 85% |
| 10 | Relaxation | High HF, RMSSD > 70ms | SCL dropping, minimal SCR | 92% |
| 11 | Meditative State | Very high HF, coherent rhythm | Very low SCL, no SCR | 90% |
Emotional Mining logic: positive emotions (Calm, Joy, Focus, Relaxation, Meditative) → high E_score → high WVI → higher yield. Taking care of emotional state literally "mines" economic value.
4. Component 2 — Recovery (35%)
Reflects the body's adaptive reserve — ability to recover from physical and emotional loads.
Key metrics: ▸ Sleep quality: total duration, efficiency, phases (light/deep/REM) ▸ Recovery score: resting HR, HRV in first 30min of sleep, temperature trend ▸ Chronobiological pattern: sleep-wake cycle regularity
Normalization: results adjusted by individual rolling 90-day baseline and age correction.
5. Component 3 — Physical Activity (30%)
Measures volume and quality of daily physical activity.
Key metrics: ▸ Steps, distance, calories (active + basal) ▸ MVPA (Moderate-to-Vigorous Physical Activity) in minutes ▸ Training intensity: HR zones, VO₂max estimate ▸ Activity/recovery balance (overtraining = P_score reduction)
6. WVI → Target Yield Table (canonical — SSOT)
This is the single canonical yield tier table. All documents must reference this version.
| WVI Monthly | Target Yield/month | Realistic Range* | Annual Equivalent |
|---|---|---|---|
| 0–39 | 0% | 0% | 0% |
| 40–49 | 2% | 1–3% | ~24% |
| 50–59 | 5% | 3–7% | ~60% |
| 60–69 | 8% | 5–10% | ~96% |
| 70–79 | 12% | 8–15% | ~144% |
| 80–89 | 16% | 10–18% | ~192% |
| 90–100 | 20% | 12–20% | ~240% |
*Realistic Range depends on DeFi market conditions, strategy performance, and SR ratio.
⚠️ Target Yield is not a guarantee. Actual yield depends on DeFi market conditions, WVI score, and strategy allocation. Dynamic Yield Cap adjusts automatically when SR < 1.0. Average historical blended: 1.5–3.5%/month.
Calibration period (Days 1–7): WVI = 50 neutral. Yield = 5%/month fixed (not 8%, not 20%). Honest framing, no inflated expectations.
Wellness Boost (streak bonus):
| Streak | Bonus |
|---|---|
| 30 days | +0.5% |
| 90 days | +1.0% |
| 180 days | +1.5% |
| 365 days | +2.0% |
7. WVI Allocation Modifier
WVI determines the aggressiveness of yield strategy allocation (→ 06_YIELD_PROTOCOL):
| WVI | Allocation | Yield Ceiling |
|---|---|---|
| 0–39 | 80% DeFi+RWA · 20% Arbitrage | ~1%/month |
| 40–69 | 60% DeFi+RWA · 30% Arbitrage · 10% Prediction | ~4%/month |
| 70–89 | 40% DeFi+RWA · 30% Arbitrage · 30% Prediction | ~10%/month |
| 90–100 | 30% DeFi+RWA · 20% Arbitrage · 50% Prediction | ~20%/month |
Low WVI = conservative portfolio (capital protection). High WVI = aggressive allocation (maximum yield).
8. Edge Cases
| Situation | Handling |
|---|---|
| Bracelet not worn (day) | WVI_daily = 0 (or Grace Day if available) |
| Partial wear (< 6h) | Proportional calculation by actual wear time |
| Motion artifacts | Accelerometer filtering, anomalous segments excluded |
| Extreme training | Separates fatigue from overtraining (HR + recovery cross-validation) |
| Illness / abnormal values | "Recovery mode" flag, increased weight of recovery component |
| Timezone change | Chronobiological correction (jet lag adjustment) |
| Night shift | Sleep-wake cycle inversion — baseline recalibration |
| Sleep disorder (< 3h) | R_score = 0, notification flag |
| First 7 days | Calibration — WVI = 50, yield = 5%/month fixed |
| Grace Day (≤3/month) | WVI = rolling 7-day average of active days |
9. Anti-Cheat System
Data integrity is critical for yield trust. Multi-layer protection:
| Threat | Countermeasure |
|---|---|
| Physical movement simulation | HRV + accelerometer + gyroscope coherence analysis |
| Third-party device | TEE chip: cryptographic signature on every data packet |
| Firmware modification | Secure Boot, code attestation in Trusted Execution Environment |
| Replay attacks | Timestamps + nonce in every packet |
| Synthetic biosignals | ML anomaly detector: live human vs. signal generator patterns |
| Device transfer to another person | Biometric fingerprint (unique HRV baseline pattern) |
| Sleep manipulation | Cross-validation: thermometer + motion + sleep phases |
| Network attacks | E2E BLE 5.3 encryption, API mutation testing |
Trusted Data Pipeline:
Wellex Band (TEE signed) → BLE E2E → Edge Server (signature verify) → Blockchain Oracle → WVI Engine → Yield Calculation
Fraud Score: every session gets a fraud_score (0–100). Above threshold → automatic WVI reset for the period + user notification.
10. Lazy Factor in WVI
| Aspect | Implementation |
|---|---|
| Auto-calculation | WVI calculated continuously, no user action needed |
| AI projection | "At current pace, yield = 12%. To reach 16%, need +8 WVI." |
| Trend analysis | Weekly and monthly graphs with forecast |
| Community display | WVI shown in profile and leaderboards |
Integration Points
▸ Yield mechanics → 06_YIELD_PROTOCOL.md ▸ APP display of WVI → 04_APP_UX.md ▸ WEB display of WVI → 05_DASHBOARD.md ▸ Technical specifications → 25_TECH_REQUIREMENTS.md ▸ Emotional Mining concept → 27_EMOTIONAL_MINING.md
Open Issues
▸ 10-tier scale → unified to 7-tier ✅ (v4.0 — aligns with 06_YIELD_PROTOCOL) ▸ Calibration yield → 5%/month fixed ✅ (was 8% — corrected) ▸ Grace Days → added ✅ ▸ WVI Floor for stakers → added ✅ ▸ Scientific source list: pending publication in 25_TECH_REQUIREMENTS.md
Changelog
▸ v1.0 — Initial WVI spec (Feb 2026) ▸ v2.0 — 11-emotion table added (Feb 2026) ▸ v3.0 — Anti-cheat system expanded (Mar 2026) ▸ v4.0 — Unified to 7-tier yield table (SSOT), calibration yield corrected to 5%/month, Grace Days added, WVI Floor for stakers added, Realistic Range column added, full EN reformat
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