Effect of IMU Design on IMU-Derived Stride Metrics for Running
Abstract
:1. Introduction
2. Materials and Methods
2.1. Subjects and Experimental Protocol
2.2. Overview of the ZUPT Method
2.3. Data Processing and Analysis
3. Results
3.1. Effect of Accelerometer Range
3.2. Effect of Gyro Range
3.3. Effect of Sampling Frequency
4. Discussion
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Appendix A—Full Statistical Results from Linear Mixed-Effects Models
Speed Effect | Estimated Slope (%/(m/s)) | p-Value | 95% Conf. Int. |
---|---|---|---|
Baseline (100g) | −0.39 | <0.01 | (−0.65, −0.13) |
75 g vs. Baseline | 0.00 | 0.99 | (−0.37, 0.37) |
50 g vs. Baseline | −0.03 | 0.88 | (−0.39, 0.34) |
24 g vs. Baseline | −0.57 | <0.01 | (−0.94, −0.21) |
16 g vs. Baseline | −1.08 | <0.001 | (−1.45, −0.72) |
10 g vs. Baseline | −2.24 | <0.001 | (−2.60, −1.87) |
6 g vs. Baseline | −5.70 | <0.001 | (−6.06, −5.33) |
Speed Effect | Estimated Slope (%/(m/s)) | p-Value | 95% Conf. Int. |
---|---|---|---|
Baseline (2000 deg/s) | −0.41 | <0.01 | (−0.68, −0.13) |
1500 deg/s vs. Baseline | 0.00 | 0.99 | (−0.39, 0.39) |
1000 deg/s vs. Baseline | 0.05 | 0.81 | (−0.34, 0.44) |
750 deg/s vs. Baseline | −0.40 | <0.05 | (−0.80, −0.01) |
500 deg/s vs. Baseline | −3.08 | <0.001 | (−3.47, −2.69) |
Speed Effect | Estimated Slope (%/(m/s)) | p-Value | 95% Conf. Int. |
---|---|---|---|
Baseline (1000 Hz) | −1.12 | <0.001 | (−1.48, −0.77) |
500 Hz vs. Baseline | −0.09 | 0.73 | (−0.59, 0.41) |
250 Hz vs. Baseline | −0.13 | 0.63 | (−0.63, 0.38) |
125 Hz vs. Baseline | −0.26 | 0.32 | (−0.76, 0.24) |
62.5 Hz vs. Baseline | 0.94 | <0.001 | (0.44, 1.44) |
Speed Effect | Estimated Slope (%/(m/s)) | p-Value | 95% Conf. Int. |
---|---|---|---|
Baseline (1000 Hz) | −1.17 | <0.001 | (−1.50, −0.85) |
500 Hz vs. Baseline | −0.01 | 0.96 | (−0.47, 0.45) |
250 Hz vs. Baseline | −0.03 | 0.90 | (−0.49, 0.43) |
125 Hz vs. Baseline | 0.08 | 0.74 | (−0.38, 0.54) |
62.5 Hz vs. Baseline | 0.12 | 0.60 | (−0.33, 0.58) |
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IMU 1 | IMU 2 | |
---|---|---|
Model | Opal | Custom design |
Manufacturer | APDM | Insight Sports, Ltd. |
Sampling Frequency (Hz) | 128 | 1000 |
Accelerometer Range (g) | ±200 | ±32 |
Angular Gyro Range (deg/s) | ±2000 | ±4000 |
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Potter, M.V.; Ojeda, L.V.; Perkins, N.C.; Cain, S.M. Effect of IMU Design on IMU-Derived Stride Metrics for Running. Sensors 2019, 19, 2601. https://doi.org/10.3390/s19112601
Potter MV, Ojeda LV, Perkins NC, Cain SM. Effect of IMU Design on IMU-Derived Stride Metrics for Running. Sensors. 2019; 19(11):2601. https://doi.org/10.3390/s19112601
Chicago/Turabian StylePotter, Michael V, Lauro V Ojeda, Noel C Perkins, and Stephen M Cain. 2019. "Effect of IMU Design on IMU-Derived Stride Metrics for Running" Sensors 19, no. 11: 2601. https://doi.org/10.3390/s19112601