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.
How it works
Three steps to a smarter training week
From signup to coached workout in under three minutes. No 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 Friel's framework, 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
The gap
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.
⚡
Stryxs
Coaches
Reads your data, decides what's next, tells you why. From $15/mo.
Stop guessing. Start training.
Free forever tier with unlimited analyses. Upgrade when you want long-term tracking and adaptive plans.
Cardiac drift over time — lower is better aerobic fitness
Analyze Workout
Upload a workout file or connect your training platform for automatic syncing.
Supports Garmin, COROS, Polar, Suunto, Apple Watch exports (.csv)
🧡
Strava Coming soon
Auto-sync every workout from any watch via Strava. The fastest way to get started.
⌚
Garmin Connect Coming soon
Direct integration with Garmin Connect for automatic workout syncing.
🍎
Apple Health Coming soon
Sync your Apple Watch workouts automatically through Apple Health integration.
📱
Samsung Health Coming soon
Direct sync with Samsung Health for Galaxy Watch users.
⌚
COROS Coming soon
Auto-sync your COROS watch workouts directly to Stryxs.
We're working on direct integrations. For now, export a CSV manually. See how →
Workout History
Every workout you've analyzed
Training Trends
Patterns across your recent training. The bigger picture Strava and Garmin don't show.
Help & Getting Started
Everything you need to get the most out of Stryxs.
⌚ Exporting from Garmin
1
Go to connect.garmin.com on your computer.
2
Click Activities, then click any workout.
3
Click the ⚙️ gear icon in the top right.
4
Click Export to CSV.
5
Upload that file in the Analyze tab.
🍎 Exporting from Apple Watch
1
Open the Health app on your iPhone.
2
Tap your profile picture (top right) → Export All Health Data.
3
This exports a ZIP. For a simpler option, use a free app like HealthFit or RunGap to export individual workouts as CSV.
4
Upload the CSV in the Analyze tab.
Direct Apple Health integration coming soon.
⌚ Exporting from COROS
1
Go to trainingtoday.coros.com on your computer.
2
Click on any activity in your timeline.
3
Click the Export button and choose CSV.
4
Upload it in the Analyze tab.
📱 Exporting from Samsung Galaxy Watch
1
Open Samsung Health app on your phone.
2
Tap the menu (☰) → Settings → Download personal data.
3
Confirm and wait for the email with your data ZIP.
4
For individual workouts, third-party apps like Strava (auto-syncs Samsung) or FITWatch Sync can export CSV.
Direct Samsung Health integration coming soon.
🎯 Finding your LTHR
LTHR (Lactate Threshold Heart Rate) is the most important number for accurate zones.
1
Warm up for 15 minutes.
2
Do a 30-minute solo time trial at the hardest pace you can sustain.
3
Your average HR for the last 20 minutes is your LTHR.
Test run and bike separately. They differ by 5-10 bpm.
Frequently asked questions
What watches does Stryxs support?
Any watch that exports CSV, TCX, GPX, or FIT files — Garmin, Apple Watch, COROS, Polar, Suunto, Wahoo. Garmin is most common and best supported.
Will you add automatic syncing?
Yes — Strava integration is coming first (covers most watches since Strava auto-syncs them). Direct Garmin and Apple Health integration will follow.
Is my data private?
Yes. Your data is stored encrypted in our database. Only you can access it. We never share or sell training data.
How accurate are the analyses?
Based on published sports science: Friel LTHR zones, cardiac drift research, acute:chronic workload models. Accuracy depends on YOUR inputs — especially your LTHR. Test it properly.
What's the difference between Stryxs and Strava?
Strava is a social network for activities. Stryxs is a coaching analyzer. We turn data into coaching decisions. Strava doesn't.
What does it cost?
Free tier: unlimited analyses, 7 days of history. Pro ($15/mo): unlimited history, trend analysis, race planning, auto platform sync. Elite ($29/mo): Pro + injury risk scoring, nutrition periodization, race-day planning.
Settings
Edit your profile, training zones, and preferences.
Workout Details
Confirm
📥 Import Existing Plan
Paste your existing training plan below and Coach will structure it into your calendar. Works with plans from another coach, training app, or AI.
Tips for best results:
Include at least one week of workouts
Use labels like "Monday", "Tuesday" or days from now
Include sport (run/bike/swim), duration, intensity if possible
Keep it under 4 weeks worth
Log out?
You'll need to log in again to access your account.