Table 3. Validity measures from participants (N = 21) who wore a concurrent criterion device during the 1-mile downhill return of a 2-mile trail run.
| Garmin Fenix 5 | Jabra Elite Sport | Motiv Ring | Scosche Rhythm+ | Suunto Spartan Sport | |
|---|---|---|---|---|---|
| Heart rate (bpm) | 142 (21) | 135 (56) | 141 (25) | 152 (26) | 158 (24) |
| MAPE (%) | 13.4 | 20.6 | 15.4 | 3.8 | 2.2 |
| MAE (bpm) | 20.0 | 29.5 | 24.7 | 5.4 | 3.4 |
| Bias (SD) | 11.6 (258.3) | 16.6 (991.2) | 20.9 (603.4) | 1.9 (29.3) | -0.6 (13.6) |
| Limits of Agreement (95% CI) | -92.5 (-101.0 to -83.9) to 115.8 (107.2 to 124.3) | -214.3 (-230.1 to -198.4) to 247.4 (231.5 to 263.3) | -133.7 (-153.3 to -114.2) to 175.5 (155.9 to 195.0) | -67.7 (-70.6 to -64.7) to 71.5 (68.5 to 74.5) | -50.6 (-52.6 to -48.6) to 49.4 (47.4 to 51.5) |
| rC (95% CI) | 0.381 (0.361 to 0.400) | 0.397 (0.386 to 0.407) | 0.157 (0.054 to 0.256) | 0.885 (0.880 to 0.889) | 0.949 (0.947 to 0.951) |
| ICC (p-value) | 0.381 (<0.001) | 0.431 (<0.001) | 0.145 (<0.001) | 0.885 (<0.001) | 0.949 (<0.001) |
Data expressed as mean (SD). MAPE = Mean absolute percent error, MAE = Mean Absolute Error, rC = Lin’s Concordance Correlation Coefficient, ICC = Intraclass correlation coefficient.