Document Detail


Relationship between Running Speed and Initial Foot Contact Patterns.
MedLine Citation:
PMID:  24504424     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: This study assessed initial foot contact patterns (IFCP) in a large group of distance runners and the effect of speed on the IFCP.
METHODS: We determined the strike index, to classify the runners in IFCP groups, at 4 speeds (3.2, 4.1, 5.1, 6.2 m[BULLET OPERATOR]s) by measuring center of pressure (COP) with a 2 m plantar pressure plate. Such a system allows a direct localization of the COP on the plantar footprint and has a low threshold value (2.7 N·cm) resulting in more accurate COP data at low ground reaction forces than when obtained from force plate.
RESULTS: The IFCP distribution evolves from mostly initial rearfoot contact (IRFC) (82%) at 3.2 m[BULLET OPERATOR]s to more anterior foot contacts with about equal distribution of IRFC (46%) and initial midfoot or forefoot contact (IMFC+IFFC) (54%) at 6.2 m[BULLET OPERATOR]s. About 44% of the IRFC runners showed atypical COP patterns with fast anterior displacement of the COP along the lateral shoe margin. Apart from the different COP patterns, these atypical IRFC were also characterized by a significantly higher instantaneous vertical loading rate than the typical IRFC patterns.
CONCLUSION: The IFCP distribution changes were due to intra-individual alterations in IFCP at higher speeds. That is, 45% of the runners made one or even two 'transitions' towards a more anterior IFCP (and 3% shows some other type of transition between initial foot contact styles as speed increases). Although, 52% of the runners remained with the same IFCP.
Authors:
Bastiaan Breine; Philippe Malcolm; Edward C Frederick; Dirk De Clercq
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-2-5
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2014 Feb 
Date Detail:
Created Date:  2014-2-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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