title: Potential of IMU Sensors in Performance Analysis of Professional Alpine Skiers.
abstract: In this paper, we present an analysis to identify a sensor location for an inertial measurement unit (IMU) on the body of a skier and propose the best location to capture turn motions for training. We also validate the manner in which the data from the IMU sensor on the proposed location can characterize ski turns and performance with a series of statistical analyses, including a comparison with data collected from foot pressure sensors. The goal of the study is to logically identify the ideal location on the skier's body to attach the IMU sensor and the best use of the data collected for the skier. The statistical analyses and the hierarchical clustering method indicate that the pelvis is the best location for attachment of an IMU, and numerical validation shows that the data collected from this location can effectively estimate the performance and characteristics of the skier. Moreover, placement of the sensor at this location does not distract the skier's motion, and the sensor can be easily attached and detached. The findings of this study can be used for the development of a wearable device for the routine training of professional skiers.
authors.affiliation: Industrial Engineering &amp; Management Research Institute, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea. ygjgy@kaist.ac.kr.
authors.forename: Gwangjae
authors.initials: G
authors.lastname: Yu
authors.affiliation: Department of Industrial &amp; Systems Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea. yjang@kaist.ac.kr.
authors.forename: Young Jae
authors.initials: YJ
authors.lastname: Jang
authors.affiliation: Department of Industrial &amp; Systems Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea. mbnmbckbs@kaist.ac.kr.
authors.forename: Jinhyeok
authors.initials: J
authors.lastname: Kim
authors.affiliation: Department of Physical Education, Korea National Sport University, Seoul 05541, Korea. kimjhski@knsu.ac.kr.
authors.forename: Jin Hae
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Division of Liberal Arts and Science, Korea National Sport University, Seoul 05541, Korea. hykim@knsu.ac.kr.
authors.forename: Hye Young
authors.initials: HY
authors.lastname: Kim
authors.affiliation: Department of Physical Education, Seoul National University, Seoul 08826, Korea. dkrlcla9@snu.ac.kr.
authors.forename: Kitae
authors.initials: K
authors.lastname: Kim
authors.affiliation: Department of Physical Education, Seoul National University, Seoul 08826, Korea. ccdartha@snu.ac.kr.
authors.forename: Siddhartha Bikram
authors.initials: SB
authors.lastname: Panday
mesh_terms: D000328:Adult; D054874:Athletic Performance / Q000502:physiology; D001696:Biomechanical Phenomena; D015374:Biosensing Techniques / Q000295:instrumentation*; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D009068:Movement / Q000502:physiology*; D012865:Skiing / Q000502:physiology*
keywords: IMU sensor; alpine skiing; performance evaluation; stability