Table 1.
Stride duration reference and best personal sensor position per body part across all athletes derived with the cmplx algorithm.
| Speed (m/s) | Calcaneus Reference | Best simulated sensor | Body side | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Upper arm | Lower arm | Upper leg | Lower leg | Foot | ||||||||||||||
| Mean | SD | Mean | SD | nRMSE | Mean | SD | nRMSE | Mean | SD | nRMSE | Mean | SD | nRMSE | Mean | SD | nRMSE | ||
| (m/s) | (m/s) | (%) | (m/s) | (%) | (m/s) | (%) | (m/s) | (%) | (m/s) | (%) | ||||||||
| 2 | 814.6 | 96.4 | 813.8 | 97.2 | 0.1 | 814.7 | 96.5 | 0.0 | 814.5 | 96.5 | 0.0 | 814.6 | 96.4 | 0.0 | 814.7 | 96.5 | 0.0 | Right |
| 3 | 794.0 | 93.4 | 774.0 | 90.3 | 2.5 | 772.9 | 90.6 | 2.7 | 773.4 | 90.5 | 2.6 | 773.4 | 90.5 | 2.6 | 773.3 | 90.5 | 2.6 | |
| 4 | 772.3 | 94.4 | 727.6 | 83.6 | 5.8 | 728.7 | 84.2 | 5.6 | 728.9 | 84.4 | 5.6 | 728.9 | 84.6 | 5.6 | 728.8 | 84.5 | 5.6 | |
| 5 | 743.7 | 101.3 | 657.6 | 69.8 | 11.6 | 658.0 | 69.7 | 11.5 | 657.8 | 69.7 | 11.5 | 657.8 | 69.6 | 11.5 | 657.6 | 69.7 | 11.6 | |
| 2 | 813.0 | 98.2 | 814.6 | 97.6 | 0.2 | 808.4 | 98.5 | 0.6 | 813.0 | 98.2 | 0.0 | 812.8 | 98.2 | 0.0 | 813.3 | 97.9 | 0.0 | Left |
| 3 | 793.5 | 94.3 | 758.2 | 77.8 | 4.4 | 773.1 | 90.6 | 2.6 | 773.8 | 90.8 | 2.5 | 773.9 | 90.9 | 2.7 | 773.9 | 90.8 | 2.5 | |
| 4 | 770.7 | 96.1 | 728.4 | 86.7 | 5.5 | 726.7 | 84.2 | 5.7 | 727.0 | 85.9 | 5.7 | 725.8 | 86.5 | 5.8 | 727.5 | 85.3 | 5.6 | |
| 5 | 744.3 | 101.0 | 658.8 | 70.8 | 11.5 | 658.2 | 73.7 | 11.6 | 658.2 | 71.8 | 11.6 | 662.2 | 71.2 | 11.0 | 660.3 | 71.3 | 11.3 | |
Mean, std. dev. (SD), and relative error (nRMSE) between best personal simulated sensor position and the calcaneus reference are shown for each running speed. With speed, errors increase, but personal sensor positioning can limit relative error to below 11.6%.