AI Endurance Coaching · Now in Beta

Your data.
Your coach.

Astrape synthesizes your Garmin metrics, HRV, sleep, and training history into a single AI coaching system that knows when to push — and when to hold back.

Get Early AccessSee How It Works
42+
Wearable Metrics
Real‑time
Sync & Analysis
AI‑first
Coaching Engine
Evidence
Based Decisions
CONNECTS WITH
GARMIN CONNECT · SOONSTRAVA · SOONWHOOP · SOONAPPLE HEALTH · SOONTRAINING PEAKS · SOON
02 — How It Works

Physiological intelligence,
in your pocket.

Astrape connects to your wearable ecosystem, runs continuous physiological modeling, and surfaces coaching decisions as conversational AI guidance.

01 — CONNECT
Sync your wearables
Authorize Astrape to read your Garmin Connect data — activities, sleep, HRV, body battery, and more. One-time OAuth, continuous sync.
02 — MODEL
Physiological modeling
Our engine builds a running model of your ATL, CTL, TSB, HRV baseline, and sleep debt — learning your individual adaptation curve over time.
03 — COACH
Conversational AI coaching
Ask your coach anything. "Should I do the long run today?" gets a real answer grounded in your actual physiology — not generic advice.
04 — ADAPT
Adaptive training plans
Your weekly plan shifts dynamically with your readiness. A poor night's sleep automatically adjusts tomorrow's session before you even ask.
03 — Features

Everything your coach
needs to know.

Built around the data that actually predicts performance — not just miles logged.

⚡
Readiness Score
A composite daily score built from HRV, resting HR, sleep quality, body battery, and acute load. Replaces guesswork with precision.
📈
Training Load Tracking
💬
AI Coach Chat
🗓
Dynamic Week Planning
🧠
Race Predictor
READINESS DASHBOARD
LIVE
READINESS
87
↑ 12 pts from yesterday
HRV 7-DAY AVG
72ms
+8% above baseline
SLEEP SCORE
82
7h 23m · Deep 1h 41m
BODY BATTERY
94
Fully recovered
APEX COACH · NOW
HRV 8% above baseline, body battery fully recovered. Green light for high-intensity work today — you're primed.
04 — Data Sources

Every signal that matters.

Built on the physiological signals that training platforms ignore — the ones that actually predict performance.

Heart Rate Variability
Overnight HRV from your wearable. We track your personal baseline and flag suppression that predicts overreaching before it happens.
WEARABLE DATA
Activity & Workouts
GPS tracks, pace, heart rate zones, power (where available), cadence, stride, and elevation. Full workout history powers training load modeling.
WEARABLE DATA
Sleep Architecture
Deep, REM, light, and awake time from advanced sleep monitoring. Sleep debt is a primary driver of next-day readiness scores.
WEARABLE DATA
Energy Reserve
Wearable energy reserve metrics used as a cross-validator alongside our own readiness model for a complete recovery picture.
WEARABLE DATA
VO₂ Max Estimate
Device-derived VO₂ max tracked over time. We use trend lines to validate fitness gains and refine race predictions.
WEARABLE DATA
Stress & Recovery
All-day stress and respiration data feeding a continuous recovery picture beyond just overnight metrics.
WEARABLE DATA
05 — About

Built by an athlete,
for athletes.

Astrape was born out of frustration with coaching tools that show you data but don't tell you what to do with it.

⚡
Evidence-based methodology
Every coaching decision traces back to published sports science — Banister impulse-response, HRV4Training protocols, and polarized training research.
🔒
Privacy-first architecture
Your health data is yours. We read only what's required, store only what's necessary, and never sell or share your physiological data.
🔬
Wearable-agnostic vision
Starting with deep Garmin integration, with Strava, Whoop, Apple Health, and TrainingPeaks on the roadmap. Your data ecosystem, unified.
Sean Balbale
FOUNDER & ENGINEER
Heavyweight rower and ECE/CS student. Sean built Astrape after spending years trying to reconcile wearable data with actionable training decisions — and finding no tool that did it well. Astrape is the coach he wished he had.
Company: Astrape AI
Website: astrapeai.com
Email: sean.balbale@astrapeai.com
Location: Boston, MA
Status: Beta — Early Access
06 — EARLY ACCESS

Stop guessing.
Start training smarter.

Join the waitlist for early access. We're onboarding endurance athletes one cohort at a time — no generic plans, no guesswork.

Free during beta