Device research record
Polar Grit X Pro
Signals and sensors
From the device record. Fields the source does not state are left out.
- Maker
- Polar
- Form factor
- Wrist
- Series
- Grit X Pro
- Family
- Polar Vantage V
- Signals recorded
- PPG, Accelerometer
- Also called
- Grit X Pro
What published studies show
Results quoted from 1 published validation study, each against a clinical reference. A result applies to the model and protocol tested, not to every model the brand sells. From the wearable accuracy database (v1.0.0).
Overnight heart rate1 study
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Polar Grit X Pro | 2.71%Mean absolute percentage error | ECG | n = 13, Home, during sleep, 536 nights | Dial et al. (2025)Independent |
| Polar Grit X Pro | 0.86Lin's concordance correlation | ECG | n = 13, Home, during sleep, 536 nights | Dial et al. (2025)Independent |
- Polar Grit X Pro2.71%
Mean absolute percentage error · vs ECG · n = 13, Home, during sleep, 536 nights
Dial et al. (2025) Independent
- Polar Grit X Pro0.86
Lin's concordance correlation · vs ECG · n = 13, Home, during sleep, 536 nights
Dial et al. (2025) Independent
HRV (RMSSD)1 study
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Polar Grit X Pro | 16.32%Mean absolute percentage error | ECG | n = 13, Home, during sleep, 536 nights | Dial et al. (2025)Independent |
| Polar Grit X Pro | 0.82Lin's concordance correlation | ECG | n = 13, Home, during sleep, 536 nights | Dial et al. (2025)Independent |
- Polar Grit X Pro16.32%
Mean absolute percentage error · vs ECG · n = 13, Home, during sleep, 536 nights
Dial et al. (2025) Independent
- Polar Grit X Pro0.82
Lin's concordance correlation · vs ECG · n = 13, Home, during sleep, 536 nights
Dial et al. (2025) Independent
Comparisons
Head-to-head comparisons for this brand.