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http://dx.doi.org/10.9718/JBER.2014.35.3.35

Kinematic Analysis of Lower Extremity and Evaluation of Skill of Skier Using Parameters of Inertial Sensors During Ski Simulator Exercise  

Kim, Jungyoon (Department of Biomedical Engineering, Yonsei University)
Ahn, Soonjae (Department of Biomedical Engineering, Yonsei University)
Park, Sunwoo (Department of Biomedical Engineering, Yonsei University)
Shin, Isu (Department of Biomedical Engineering, Yonsei University)
Kim, Gyoosuk (Korea Orthopedics & Rehabilitation Engineering Center)
Kim, Youngho (Department of Biomedical Engineering, Yonsei University)
Publication Information
Journal of Biomedical Engineering Research / v.35, no.3, 2014 , pp. 35-41 More about this Journal
Abstract
In this study, joint angles of the lower extremity and inertial sensor data such as accelerations and angular velocities were measured during a ski simulator exercise in order to evaluate the skill of skiers. Twenty experts and twenty unskilled skiers were recruited for the study. All expert skiers held the certificates issued by the Korea Ski Instructors Association. A three-dimensional motion capture system and two inertial sensors were used to acquire joint movements, heel acceleration and heel angular velocity during ski simulator exercises. Pattern variation values were calculated to assess the variations in ski simulator motion of expert and unskilled skiers. Integral ratio of roll angular velocity was calculated to determine the parallel alignment of the two feet. Results showed that ski experts showed greater range of motion of joint angle, peak-to-peak amplitude(PPA) of heel acceleration and PPA of heel angular velocity than unskilled skiers. Ski experts showed smaller pattern variations than unskilled skiers. In addition, the integral ratio of roll angular velocity in ski experts was closer to 1. Inertial sensor data measurements during the ski simulator exercises could be useful to evaluate the skill of the skier.
Keywords
ski simulator; inertial sensor; kinematics;
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Times Cited By KSCI : 4  (Citation Analysis)
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