Your lactate threshold.
Without a lab test.
Analysis and planning built on your real threshold: zones, load, form and VO2max from your activities.
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Get started in three steps
No lab tests or complex setup.
Upload your activity
Drag and drop FIT, GPX or TCX files. Or connect Strava when available.
We detect your threshold
Automatic analysis of your data. LT2, VO2max and load calculated from your first session.
Train with your zones
Load, form and real performance evolving with every session.
How we detect your threshold
We compare heart rate and pace across your runs and locate the deflection point where your body shifts from aerobic to threshold. That point is your LT2, in bpm and pace.
- No lactate test or lab: all you need is to train with a heart rate monitor.
- Recalibrated with every activity: your threshold evolves with you.
- Your LT2 as the reference to set up your HR, pace and power zones.
Plan on top of your real threshold
Set up your zones from your real threshold, not a generic formula. Plan sessions on the calendar and keep load, fatigue and form under control before overtraining hits.
- Training calendar with your sessions and planned load.
- Acute and chronic load computed on your real zones.
- Form = fitness minus fatigue: know when to push and when to recover.
Discover what time you can run
Using your threshold, VO2max and recent load, LT2 estimates your times for 5K, 10K, half marathon and marathon. Not a generic calculator: your current form.
- Estimated times per distance, updated with every session.
- Potential pace evolution across the training cycle.
- Compare predictions with your actual race results.
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For the serious athlete
Built for athletes who want to understand their training, not just log it.
Lactate threshold (LT2)
Automatically detects your threshold from your real training data. Without lab tests.
Personalized zones
Heart rate, pace and power. Set them up with your real threshold as the reference, no generic numbers.
Training load
Acute, chronic load and fitness over time. See when you're in shape and when you need to recover.
Estimated VO2max
Continuous estimation based on your own data. Without lab tests, without guesses.
Import from anywhere
Automatic Strava sync. Manual upload of FIT, GPX and TCX files.
Performance analysis
Power curves, intensity distribution, splits per kilometer and historical evolution.
For the coach
Team tracking and planning from a single platform. Not yet available.
Athlete tracking
View load, form and trends of all your athletes in a single panel.
Activity review
Access the full detail of every session, add comments and rate effort.
Planning
Design training cycles and assign them to your athletes with full load control.
Team management
Organize athletes, share access with other coaches and manage roles within the team.
Frequently asked questions
The essentials about LT2 at a glance.
- LT2 analyzes your heart rate and pace during runs to detect the point where your physiology shifts from aerobic to threshold. No lactate test needed — just train with a heart rate monitor.
Get started with your real data
Connect Strava or upload your FIT, GPX or TCX files to see load, threshold and performance from your first session.
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Your data is yours: disconnect Strava or delete your account anytime.