INFLUENCE OF INERTIAL MEASUREMENT UNIT PLACEMENT ON KNEE FLEXION ANGLE MEASUREMENT DURING CYCLING

Authors

Tjorven Schnack, University of ViennaFollow
Arnold Baca, University of Vienna
Philipp Neumeister, University of Applied Science Technikum Wien

Category

Cycling

Document Type

Paper

Abstract

Inertial measurement units (IMUs) enable measurements of joint kinematics during sports in the field. The purpose of this study was to investigate the use of IMUs for measuring the knee flexion angle during cycling. To expand the limited research on optimal placement of IMUs on body segments, three different IMU placement setups were tested. Joint angles were calculated from the IMU orientations via OpenSim. Kinematics were captured from six experienced cyclists and compared to optical motion capture. Apart from an amplitude offset between the angle courses measured by IMUs and optical motion capture, no significant differences were observed between measurement systems, regardless of the IMU placement setup. Thus, all IMU setups are comparable to optical motion capture in relative terms (RMSE between 3 deg and 3.9 deg), but not in absolute values.

Recommended Citation

Schnack, Tjorven; Baca, Arnold; and Neumeister, Philipp (2024) "INFLUENCE OF INERTIAL MEASUREMENT UNIT PLACEMENT ON KNEE FLEXION ANGLE MEASUREMENT DURING CYCLING," ISBS Proceedings Archive: Vol. 42: Iss. 1, Article 9.
Available at: https://commons.nmu.edu/isbs/vol42/iss1/9