Document Detail


Kinematic Asymmetries of the Lower Limbs during Ergometer Rowing.
MedLine Citation:
PMID:  22677926     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: Rowing injuries, particularly of the lumbar spine, are often attributed to poor technique. Rowing technique comprises a series of co-ordinated movements between the back, upper limbs and lower limbs, and abnormalities in these may lead to injury. The aim of this study was to test the hypothesis that ergometer rowing is symmetrical with respect to lower limb motion, and that deviations from symmetry result from rowing experience, work rate, or stroke position. METHODS: Twenty-two rowers in three levels of ability participated in this study. A motion analysis system was used with an instrumented rowing ergometer which incorporated load cells at the handle and seat. Kinematic measurements of the knees, hips, lumbar-pelvic joints and pelvic twist, in addition to measures of handle force, seat force, stroke length, medio-lateral seat drift and mean external power were made during an incremental step test. RESULTS: Elite rowers exhibited the largest handle force and mean external power (P < 0.01), and least medio-lateral seat drift (P < 0.01). All groups demonstrated lower limb asymmetries, with hip asymmetries significantly greater than knee asymmetries (P < 0.01). Regression analysis indicated that both hip and knee range of motion (ROM) asymmetry was significant (P < 0.05) in predicting lumbar-pelvic flexion at the catch and maximum handle force of the stroke. However, hip ROM asymmetry showed a better relationship with lumbar-pelvic flexion compared to knee ROM asymmetry, explaining a greater proportion of the variance. CONCLUSION: Bilateral asymmetries during the rowing stroke, particularly at the hips, can contribute to sub-optimal kinematics of the lumbar-pelvic region. Quantification of hip ROM asymmetries may therefore be a useful tool in predicting the development of low-back pain in rowers.
Authors:
Erica Buckeridge; Simon Hislop; Anthony Bull; Alison McGregor
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-6
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-8     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:  -    
Affiliation:
1Department of Surgery & Cancer, Imperial College London, UK 2Department of Bioengineering, Imperial College London, UK.
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