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A simple method for measuring power, force, velocity properties, and mechanical effectiveness in sprint running
Author(s) -
Samozino P.,
Rabita G.,
Dorel S.,
Slawinski J.,
Peyrot N.,
Saez de Villarreal E.,
Morin J.B.
Publication year - 2016
Publication title -
scandinavian journal of medicine and science in sports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.575
H-Index - 115
eISSN - 1600-0838
pISSN - 0905-7188
DOI - 10.1111/sms.12490
Subject(s) - sprint , ground reaction force , acceleration , force platform , force field (fiction) , power (physics) , reliability (semiconductor) , simulation , center of mass (relativistic) , mathematics , computer science , mechanics , kinematics , physics , classical mechanics , software engineering , quantum mechanics , artificial intelligence , energy–momentum relation
This study aimed to validate a simple field method for determining force– and power–velocity relationships and mechanical effectiveness of force application during sprint running. The proposed method, based on an inverse dynamic approach applied to the body center of mass, estimates the step‐averaged ground reaction forces in runner's sagittal plane of motion during overground sprint acceleration from only anthropometric and spatiotemporal data. Force– and power–velocity relationships, the associated variables, and mechanical effectiveness were determined (a) on nine sprinters using both the proposed method and force plate measurements and (b) on six other sprinters using the proposed method during several consecutive trials to assess the inter‐trial reliability. The low bias (<5%) and narrow limits of agreement between both methods for maximal horizontal force (638 ± 84 N), velocity (10.5 ± 0.74 m/s), and power output (1680 ± 280 W); for the slope of the force–velocity relationships; and for the mechanical effectiveness of force application showed high concurrent validity of the proposed method. The low standard errors of measurements between trials (<5%) highlighted the high reliability of the method. These findings support the validity of the proposed simple method, convenient for field use, to determine power, force, velocity properties, and mechanical effectiveness in sprint running.