Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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Real-time Location Tracking Analysis of Cross-country Skiing using Various Wearable Devices: A Case Study

다양한 웨어러블 디바이스를 활용한 크로스컨트리스키 실시간 위치 추적: 사례 연구

  • Hwang, Jinny (Department of Health & Exercise Science, Korea National Sport University) ;
  • Kim, Jinhae (Korea National Sport University, Physical Education) ;
  • Kim, Hyeyoung (Korea National Sport University, Division of Liberal Arts and Science) ;
  • Moon, Jeheon (Department of Sports Science, Korea Institute of Sport Science) ;
  • Lee, Jusung (Department of Sport Science, Kangwon National University) ;
  • Kim, Jinhyeok (Department of Industrial & Systems Engineering, Korea Advanced Institute of Science and Technology)
  • Received : 2019.02.22
  • Accepted : 2019.03.26
  • Published : 2019.03.31
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Abstract

Objective: The purpose of this study was to confirm that the cross-country ski sprint course in PyeongChang, where the 2018 Winter Olympics course was to utilize wearable devices equipped with inertial measurement unit (IMU), global positioning system (GPS) and heart rates sensor. Method: For the data collection, two national level cross-country (XC) skiers performed classic technique on the entire sprint course. We analyzed cycle characteristics, range of motion on double poling (DP) technique, average velocity, and displacement of 3 points according to the terrain. Results: The absolute cycle time gradually decreased during starting, middle and finish sections. While the length of the DP increased and the heart rates tended to increase for men skier. In addition, the results indicated that range of motion of knee joint during starting and finish section decreased more than middle section. The errors of latitude and longitude data collected through GPS were within 3 m from 3 points. Conclusion: Through the first case study in Korea, which analyzed the location and condition of XC skiers in the entire sprint course in real time, confirmed that feedback was available in the field using various wearable sensors.

Keywords

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Figure 1. Cross-country skiers with IMU, GPS, and heart rates sensor

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Figure 2. Visualizations between time-trial locations and flat, uphill and downhill on the sprint course (left: male, right: female)

Table 1. General characteristics of the 2 professional skiers that participated in the study

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Table 2. The change of cycle characteristic, heart rates, and ROM of double poling technique

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Table 4. Planar displacements calculated through GE and GPS at each point from starting point

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Table 3. The results of average velocity according to the characteristic of sprint course

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