Document Detail

Bilateral pedaling asymmetry during a simulated 40-km cycling time-trial.
MedLine Citation:
PMID:  17369798     Owner:  NLM     Status:  MEDLINE    
AIM: This study investigated the pedaling asymmetry during a 40-km cycling time-trial (TT). METHODS: Six sub-elite competitive male cyclists pedaled a SRM Training Systems cycle ergometer throughout a simulated 40-km TT. A SRM scientific crank dynamometer was used to measure the bilateral crank torque (N.m) and pedaling cadence (rpm). All data were analyzed into 4 stages with equal length obtained according to total time. Comparisons between each stage of the 40-km TT were made by an analysis of variance (ANOVA). Dominant (DO) and non-dominant (ND) crank peak torque asymmetry was determined by the equation: asymmetry index (AI%)=[(DO-ND)/DO] 100. Pearson correlation analysis was performed to verify the relationship between exercise intensity, mean and crank peak torque. RESULTS: The crank peak torque was significantly (P<0.05) greater in the 4th stage compared with other stages. During the stages 2 and 3, was observed the AI% of 13.51% and 17.28%, respectively. Exercise intensity (%VO(2max)) was greater for stage 4 (P<0.05) and was highly correlated with mean and crank peak torque (r=0.97 and r=0.92, respectively) for each stage. CONCLUSIONS: The DO limb was always responsible for the larger crank peak torque. It was concluded that pedaling asymmetry is present during a simulated 40-km TT and an increase on crank torque output and exercise intensity elicits a reduction in pedaling asymmetry.
F P Carpes; M Rossato; I E Faria; C Bolli Mota
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  47     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  2007 Mar 
Date Detail:
Created Date:  2007-03-19     Completed Date:  2007-06-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  51-7     Citation Subset:  IM    
Biomechanics Laboratory, Physical Education and Sports Faculty, Federal University of Santa Maria, RS, Brazil.
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MeSH Terms
Analysis of Variance
Bicycling / physiology*
Exercise Test
Functional Laterality / physiology
Leg / physiology*
Oxygen Consumption / physiology

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

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