Effect of four different step detection thresholds on nonmotorized treadmill sprint measurement
Abstract
The purpose of this study was to investigate the effect of 4 different step detection thresholds (10, 15, 20, and 30% body mass [BM]) on the kinetics and kinematics of a youth population sprinting on a Woodway nonmotorized treadmill (NMT). A total of 16 male youth athletes sprinted 30 m from a split start position. Of the 15 variables measured, significant differences (p ≤ 0.05) were found in the measurement of 5 kinematic (step length, vertical displacement, contact time, eccentric, and concentric time) and 2 kinetic (vertical and leg stiffness) variables between the 10 vs. 20 and 30% BM step detection thresholds. Contact time was also significantly different (12%) between 15 vs. 30% BM step detection thresholds. In terms of reliability, the 15 and 30% BM step detection thresholds were found the most stable across all variables (average coefficient of variation ∼6.0%). Given this information, a step detection threshold of 15% BM is recommended for quantifying kinematic and kinetic variables on a NMT, as this threshold seems to account for signal variability appropriately without compromising reliability.
RAS ID
19187
Document Type
Journal Article
Date of Publication
1-1-2014
Faculty
Faculty of Health, Engineering and Science
School
School of Exercise and Health Sciences
Copyright
subscription content
Publisher
Lippincott Williams and Wilkins
Recommended Citation
Cronin, J. B., & Rumpf, M. C. (2014). Effect of four different step detection thresholds on nonmotorized treadmill sprint measurement. DOI: https://doi.org/10.1519/JSC.0000000000000497
Comments
Cronin J.B., & Rumpf M.C. (2014). Effect of four different step detection thresholds on nonmotorized treadmill sprint measurement. Journal of Strength and Conditioning Research, 28(10), 2996-3000. Available here