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http://dx.doi.org/10.5103/KJSB.2019.29.1.1

Real-time Location Tracking Analysis of Cross-country Skiing using Various Wearable Devices: A Case Study  

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)
Publication Information
Korean Journal of Applied Biomechanics / v.29, no.1, 2019 , pp. 1-8 More about this Journal
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
Cross-country skiing; Sprint course; Double poling; Wearable device; Real-time location tracking;
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