Contact time, flight time and ground reaction forces during a controlled running trial of elite american football players

Running speed is influenced by vertical ground reaction force (vGRF) application, foot-ground contact time (Tc), flight time (TF), and time taken to reposition the limbs in swing. The purpose of this study was to investigate running speed modulators in two groups of elite American football players [Skill (i.e. wide receivers, defensive backs, n=8) and Big Skill (i.e. linebackers, tight ends, n=8)]. Subjects ran at 6.5 m/s for 5 sec on an instrumented treadmill. Peak vGRF, Tc and TF were examined for overall associations and compared between groups. Tc was strongly associated with vGRF, p<.001. Big Skill had larger absolute vGRF, p=.012 than Skill. Skill players had larger TF, smaller TC, and smaller relative vGRF, although not significant. Elite American football players apply large forces over long foot-ground contact time during a controlled run
© Copyright 2018 ISBS Proceedings Archive. Northern Michigan University. Published by International Society of Biomechanics in Sports. All rights reserved.

Subjects: biomechanics test running sprint American football velocity
Notations: sport games
Tagging: Bodenreaktionskraft Bodenreaktionszeit
Published in: ISBS Proceedings Archive
Editors: P. A. Hume, J. Alderson, B. Wilson
Published: Auckland International Society of Biomechanics in Sports 2018
Volume: 36
Issue: 1
Pages: 253-256
Document types: congress proceedings
electronical journal
Language: English
Level: advanced