VALIDITY OF A VELOCITY-BASED TRAINING DEVICE FOR ASSESSING PEAK FORCE, VELOCITY, AND POWER IN MEDICINE BALL THROWS: A PILOT STUDY

Authors

Kazuhiro ISHIMURA, NIHON FUKUSHI UNIVERSITYFollow

Category

Wearable Technology

Document Type

Paper

Abstract

This pilot study examined the validity of a wearable VBT device for measuring peak velocity, force, and power during vertical medicine ball throws. Two participants each performed nine throws while wearing the device, and a single high-speed camera tracked only the medicine ball. Velocity and power were computed from ball position using video-based analysis. The VBT device showed strong correlations for velocity (r = 0.945, bias = –2.01 ± 1.17 m/s) and force (r = 0.969, bias = –64.16 ± 28.31 N), but power showed a weak correlation (r = 0.150, bias = 277.8 ± 337.1 W) and high variability. Bland–Altman plots revealed systematic underestimations in velocity and force. These findings suggest the device may help monitor velocity trends, but power estimates should be interpreted cautiously. Further validation is needed before use in applied sport or clinical settings.

Recommended Citation

ISHIMURA, Kazuhiro (2025) "VALIDITY OF A VELOCITY-BASED TRAINING DEVICE FOR ASSESSING PEAK FORCE, VELOCITY, AND POWER IN MEDICINE BALL THROWS: A PILOT STUDY," ISBS Proceedings Archive: Vol. 43: Iss. 1, Article 38.
Available at: https://commons.nmu.edu/isbs/vol43/iss1/38