Document Detail


Subtalar and knee joint interaction during running at various stride lengths.
MedLine Citation:
PMID:  14625513     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIM: It has been suggested that during running proper coordination between subtalar pronation/supination and knee flexion/extension via tibial rotation is important to attenuate ground reaction impact forces (GRIF). Lack of coordination over time may produce a wide range of injuries. It was hypothesized that increasing stride length would result in higher GRIF. It was also hypothesized that alterations in stride length would result in changes of the subtalar/knee coordination. METHODS: Six subjects ran under 3 different stride lengths (normal stride, understride and overstride) at their self-selected pace. Sagittal, rear view kinematic data and GRIF kinetic data were collected. The subtalar/knee coordination was evaluated via timing and relative velocity measures. Repeated measures ANOVA were performed on these measures with a Tukey post-hoc analysis conducted where appropriate (p<0.01). RESULTS: Increased stride length produced significant increases in GRIF and significantly augmented the differences between rearfoot and knee angular velocities. A change in the rearfoot angle curve from a unimodal (1 minimum) to a bimodal (2 minimums) parabolic configuration was also observed. The appearance of the additional minimum was attributed to the increased impact with the ground. CONCLUSION: The results indicated that increases in GRIF via changes in stride length could disrupt the coordination between subtalar and knee joint actions.
Authors:
N Stergiou; B T Bates; M J Kurz
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Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  43     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  2003 Sep 
Date Detail:
Created Date:  2003-11-19     Completed Date:  2004-03-09     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  319-26     Citation Subset:  IM    
Affiliation:
School of Health Physical Education and Recreation, University of Nebraska at Omaha, Omaha, NE 68182-0216, USA. nstergiou@mail.unomaha.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Analysis of Variance
Biomechanics*
Humans
Knee Joint / anatomy & histology*,  physiology*
Reference Values
Running / physiology*
Subtalar Joint / anatomy & histology*,  physiology*

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


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