Document Detail

Correlation between ground reaction force and tibial acceleration in vertical jumping.
MedLine Citation:
PMID:  18089915     Owner:  NLM     Status:  MEDLINE    
Modern electronics allow for the unobtrusive measurement of accelerations outside the laboratory using wireless sensor nodes. The ability to accurately measure joint accelerations under unrestricted conditions, and to correlate them with jump height and landing force, could provide important data to better understand joint mechanics subject to real-life conditions. This study investigates the correlation between peak vertical ground reaction forces, as measured by a force plate, and tibial axial accelerations during free vertical jumping. The jump heights calculated from force-plate data and accelerometer measurements are also compared. For six male subjects participating in this study, the average coefficient of determination between peak ground reaction force and peak tibial axial acceleration is found to be 0.81. The coefficient of determination between jump height calculated using force plate and accelerometer data is 0.88. Data show that the landing forces could be as high as 8 body weights of the jumper. The measured peak tibial accelerations ranged up to 42 g. Jump heights calculated from force plate and accelerometer sensors data differed by less than 2.5 cm. It is found that both impact accelerations and landing forces are only weakly correlated with jump height (the average coefficient of determination is 0.12). This study shows that unobtrusive accelerometers can be used to determine the ground reaction forces experienced in a jump landing. Whereas the device also permitted an accurate determination of jump height, there was no correlation between peak ground reaction force and jump height.
Niell G Elvin; Alex A Elvin; Steven P Arnoczky
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of applied biomechanics     Volume:  23     ISSN:  1065-8483     ISO Abbreviation:  J Appl Biomech     Publication Date:  2007 Aug 
Date Detail:
Created Date:  2007-12-19     Completed Date:  2008-01-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9315240     Medline TA:  J Appl Biomech     Country:  United States    
Other Details:
Languages:  eng     Pagination:  180-9     Citation Subset:  IM    
Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, USA.
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MeSH Terms
Gait / physiology*
Locomotion / physiology*
Statistics as Topic
Task Performance and Analysis*
Tibia / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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