Table 2 Validity indices (accuracy, bias, and precision) averaged across wear location for each speed bout
| Â | Treadmill speed, km/h (mph) | Â | Â | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
Slow | Normal | Fast | ||||||||
0.8 (0.5) | 1.6 (1.0) | 2.4 (1.5) | 3.2 (2.0) | 4.0 (2.5) | 4.8 (3.0) | 5.6 (3.5) | 6.4 (4.0) | 7.2 (4.5) | 8.0 (5.0) | |
Waist | ||||||||||
 MAPE ± SD | 92.4 ± 11.2 | 74.1 ± 25.2 | 40.7 ± 26.8 | 16.6 ± 18.3 | 5.9 ± 12.1 | 4.1 ± 11.6 | 2.7 ± 8.9 | 3.1 ± 9.1 | 2.6 ± 8.6 | 2.6 ± 6.1 |
 MPE ± SD | − 92.4 ± 11.2 | −74.1 ± 25.3 | − 39.7 ± 28.2 | − 15.3 ± 19.4 | −5.0 ± 12.5 | −2.6 ± 12.0 | −1.7 ± 9.2 | −1.7 ± 9.4 | −0.9 ± 8.9 | 1.2 ± 6.6 |
Wrist/Arm | ||||||||||
 MAPE ± SD | 93.8 ± 9.4 | 83.6 ± 19.0 | 68.5 ± 28.1 | 56.2 ± 34.3 | 52.4 ± 37.1 | 50.1 ± 36.8 | 51.2 ± 36.1 | 52.2 ± 33.8 | 54.9 ± 32.0 | 53.2 ± 28.7 |
 MPE ± SD | − 93.8 ± 9.4 | − 83.6 ± 19.0 | − 68.4 ± 28.3 | − 56.1 ± 34.5 | −52.3 ± 37.2 | −49.7 ± 37.3 | −51.1 ± 36.2 | −52.0 ± 34.1 | − 54.6 ± 32.5 | − 51.6 ± 31.5 |
Thigh | ||||||||||
 MAPE ± SD | 60.2 ± 28.2 | 10.9 ± 14.7 | 3.2 ± 8.7 | 3.5 ± 9.0 | 3.2 ± 8.9 | 3.3 ± 9.2 | 3.7 ± 9.9 | 6.0 ± 14.7 | 9.8 ± 23.1 | 11.1 ± 24.7 |
 MPE ± SD | − 59.5 ± 29.7 | −8.9 ± 16.0 | −1.6 ± 9.1 | −1.2 ± 9.5 | −1.8 ± 9.3 | −1.7 ± 9.7 | − 2.1 ± 10.4 | −5.0 ± 15.1 | −8.5 ± 23.6 | −7.2 ± 26.2 |
Ankle | ||||||||||
 MAPE ± SD | 14.9 ± 19.8 | 4.4 ± 13.1 | 3.4 ± 13.2 | 3.6 ± 13.8 | 3.1 ± 13.4 | 2.9 ± 10.4 | 4.1 ± 12.0 | 8.7 ± 15.7 | 20.7 ± 18.0 | 23.5 ± 7.9 |
 MPE ± SD | − 14.6 ± 20.0 | −0.6 ± 13.8 | −1.5 ± 13.5 | −1.3 ± 14.2 | −1.8 ± 13.6 | −1.1 ± 10.8 | −3.0 ± 12.4 | −8.0 ± 16.1 | −20.4 ± 18.4 | −23.5 ± 7.9 |