Automatic Identification of Subtechniques in Skating-Style Roller Skiing Using Inertial Sensors
Abstract
:1. Introduction
2. Methods
2.1. Development of an Automated Identification System
2.1.1. Pre-Experiment
2.1.2. Definition of One Cycle
2.1.3. Definition of Recovery Motion
2.1.4. Detection of Main Subtechniques
2.1.5. Exceptions
2.2. Validation Experiment
2.2.1. Subjects
2.2.2. Protocol
2.2.3. Data Analysis
3. Results
4. Discussion
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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A | B | C |
---|---|---|
V1R | V1R | V1L, V2R, V2L, V2AR, V2AL |
V1L | V1L | V1R, V2R, V2L, V2AR, V2AL |
V2R | V2L, V2AL | V1R, V1L, V2R, V2AR |
V2L | V2R, V2AR | V1R, V1L, V2L, V2AL |
V2AR | V2L, V2AR | V1R, V1L, V2L, V2AL |
V2AL | V2R, V2AL | V1R, V1L, V2R, V2AR |
Cross-Country | Nordic Combined | ||
---|---|---|---|
Male (n = 4) | Female (n = 7) | Male (n = 4) | |
Age (years) | 19.0 (2.0) | 20.1 (1.5) | 19.5 (1.3) |
Height (m) | 1.78 (0.02) | 1.60 (0.05) | 1.72 (0.02) |
Weight (kg) | 71.2 (2.6) | 52.7 (3.4) | 64.3 (2.7) |
VO2max (mL/min/kg) | 69.9 (1.7) | 57.3 (6.1) | 63.3 (3.7) |
Automatic Identification | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
V1R | V1L | V2R | V2L | V2AR | V2AL | V4 | Total | Accuracy (%) | ||
Visual check | V1R | 120 | 1 | 1 | 0 | 3 | 0 | 2 | 127 | 94.5 |
V1L | 0 | 40 | 0 | 0 | 0 | 0 | 1 | 41 | 97.6 | |
V2R | 0 | 0 | 1920 | 1 | 0 | 7 | 20 | 1950 | 98.5 | |
V2L | 0 | 0 | 0 | 1932 | 3 | 0 | 20 | 1955 | 98.8 | |
V2AR | 0 | 0 | 7 | 0 | 767 | 0 | 31 | 805 | 95.3 | |
V2AL | 0 | 0 | 3 | 15 | 1 | 587 | 21 | 631 | 93.0 | |
V4 | 17 | 5 | 39 | 27 | 59 | 44 | 1047 | 1259 | 83.2 | |
Total | 137 | 46 | 1970 | 1975 | 833 | 638 | 1142 | |||
Precision (%) | 87.6 | 87.0 | 97.5 | 97.8 | 92.1 | 92.0 | 91.7 |
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Sakurai, Y.; Fujita, Z.; Ishige, Y. Automatic Identification of Subtechniques in Skating-Style Roller Skiing Using Inertial Sensors. Sensors 2016, 16, 473. https://doi.org/10.3390/s16040473
Sakurai Y, Fujita Z, Ishige Y. Automatic Identification of Subtechniques in Skating-Style Roller Skiing Using Inertial Sensors. Sensors. 2016; 16(4):473. https://doi.org/10.3390/s16040473
Chicago/Turabian StyleSakurai, Yoshihisa, Zenya Fujita, and Yusuke Ishige. 2016. "Automatic Identification of Subtechniques in Skating-Style Roller Skiing Using Inertial Sensors" Sensors 16, no. 4: 473. https://doi.org/10.3390/s16040473
APA StyleSakurai, Y., Fujita, Z., & Ishige, Y. (2016). Automatic Identification of Subtechniques in Skating-Style Roller Skiing Using Inertial Sensors. Sensors, 16(4), 473. https://doi.org/10.3390/s16040473