Yes. TrainerRoad uses a machine learning model to estimate TSS based on Heart Rate data for your outside rides when a power meter is unavailable.
Heart Rate-based TSS estimation is currently a web-only tool.
How to use Heart Rate-based TSS Estimation
Log in to the TrainerRoad website to access your career page. If we detect rides with heart rate data but without power, you'll be notified to use the HR-based TSS estimation tool upon logging in.
Current Career Page:
Adaptive Training Beta Career Page:
In order to estimate your TSS via Heart Rate, we'll need your max cycling heart rate and date of birth. If you're unsure of your maxHR, check your most recent Ramp Test to find your latest maxHR data.
Note: if you haven't completed a Ramp Test and aren't sure of your maxHR, you can use another method to find an approximate maxHR: subtract your age from 220 (it isn't perfect, but it'll get the job done until you take a Ramp Test).
Once you've entered your maxHR and DOB, you'll have three options to estimate TSS:
- Decide per ride
- Estimate all past and future rides
- Estimate future rides only
You can update your maxHR at any time. With "All past and future rides" selected, you'll be presented with the option to re-estimate all past rides with a newly entered maxHR value, or choose to only estimate future TSS with the new maxHR value.
If you dismiss the original notifications to estimate TSS via Heart Rate, you can still access the hrTSS estimation tool from the Account section of the site.
If you find that you'd like to undo your Heart Rate-based TSS estimation, you can reset TSS to 0.
How to Estimate TSS per Ride
If you've selected to estimate TSS per ride, you can do so from the website on the Calendar, the Past Rides page, and from the Ride Details page for a workout.
Note: you can swap to the ability to estimate TSS via RPE from this modal as well as manage automatic Heart Rate-Based TSS settings.
How Heart Rate-based TSS Estimation Functions in the Apps
HR-based TSS estimation is currently a web-only tool. After using HR TSS estimation on the web, you'll find your Heart Rate-based TSS estimation when drilling into a specific ride in the app.
Note: HR TSS won't appear in the app if you're on an older version. Make sure you're on the latest version for HR TSS to appear.
How accurate is Heart Rate-based TSS?
Can I still use RPE to estimate TSS instead of Heart Rate?