AI Endurance Coach

Your watch records.
Coach understands.
You get faster.

An AI coach that actually reads your training data. Builds your plan. Adapts as you go. The first endurance coach that lives in your pocket.

7-day Pro trial, no card Works with Strava + CSV from any watch Cancel anytime
Live coaching 13.94 km · long run · Saturday
Avg HR
136bpm
↓ Z2 zone held
Drift
+4.2%
strong aerobic
Time in Z2
78%
on target
Pace
5:21/km
conversational
C
Coach — Solid execution. You held under your Z2 ceiling (157 bpm) the entire run, and 4.2% drift confirms a strong aerobic engine. Tomorrow's recovery day will let you absorb this work. Keep building base.

Three steps to a smarter training week

From signup to a coached week in minutes. No human coach, no spreadsheets, no guessing.

i

Tell Coach about you

Quick intake. Your goal, your time, your level. Coach uses this to design a plan calibrated to your life, not a generic template.

ii

Get your plan

Periodized training built on proven endurance frameworks, your LTHR zones, and 80/20 distribution. Loaded into a calendar you can actually use.

iii

Train, upload, adapt

Upload after each session. Coach reads your data, comments on the run, and adjusts the plan when patterns emerge. You just train.

cardiac drift
LTHR zones
80/20 polarized
acute:chronic load
aerobic base
tempo
threshold
VO2 max
cardiac drift
LTHR zones
80/20 polarized
acute:chronic load
aerobic base
tempo
threshold
VO2 max

What others do. What we do.

Tools today record data. They don't coach you. Stryxs closes that gap.

Garmin
Records
Captures everything. Tells you nothing about what to change.
🧡
Strava
Cheers
"Nice run!" is not a training adjustment.
📊
TrainingPeaks
Displays
Numbers without meaning, unless you pay $300/mo for a coach.

Stop guessing.
Start training.

Start with a 7-day Pro trial, no card required. After that, keep training on the free tier or stay on Pro for unlimited plan generation, adaptive coaching, and deep trend analysis.

Stryxs · Built for athletes, by athletes

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