Relationship Between Pedal Force Asymmetry and Performance in Cycling

aut.relation.endpage898
aut.relation.pages6
aut.relation.startpage892
aut.relation.volume55en_NZ
aut.researcherHume, Patria
dc.contributor.authorBini, RRen_NZ
dc.contributor.authorHume, PAen_NZ
dc.date.accessioned2017-02-01T03:55:20Z
dc.date.available2017-02-01T03:55:20Z
dc.date.copyright2015-11-26en_NZ
dc.date.issued2015-11-26en_NZ
dc.description.abstractAIM: It remains unclear if cyclists with better performance have less asymmetry. Therefore, this study aimed at assessing the relationship between cycling time trial performance and bilateral asymmetries in pedal forces. METHODS: Ten cyclists/triathletes performed an incremental cycling test to exhaustion to measure maximal oxygen uptake and power output. In a second session, bilateral pedal forces were acquired during a 4-km cycling time trial on the stationary cycle ergometer. Resultant and effective forces were computed along with the index of effectiveness at 500 m sections of the time trial using instrumented pedals. Intra-limb variability and the asymmetry index were calculated for each force variable. RESULTS: Multivariate analysis assessed bilateral differences in pedal forces accounting for power output, pedalling cadence and oxygen uptake of each cyclist. Force variables did not change throughout the test (effective – P=0.98, resultant – P=0.90 and index of effectiveness – P=0.99) with larger force applied by the dominant limb (11-21%). The relationship between asymmetries and performances was strong for the effective force (r=-0.72) but weak for the resultant force (r = 0.01) and for the index of effectiveness (r=-0.29). Substantial asymmetries were observed for the effective force (36-54%), resultant force (11-21%) and for the index of effectiveness (21-32%) at greater range than intra-limb variability (effective force =8-22%, resultant force =5-10% and index of effectiveness =1-3%). CONCLUSION: Larger asymmetries in effective force were related to better performances during the 4-km time trial with low intra-limb variability for force measures suggesting consistence in asymmetries for individual cyclists.
dc.identifier.citationJournal of Sports Medicine and Physical Fitness, vol.55 (9), pp.892 - 898 (6)en_NZ
dc.identifier.urihttps://hdl.handle.net/10292/10302
dc.publisherEdizioni Minerva Medica
dc.relation.urihttp://www.minervamedica.it/index2.t?show=R40Y2015N09A0892
dc.rightsAuthor can archive post-print (ie final draft post-refereeing) after a 12-month embargo on author's personal website or institutional website. Must link to publisher website.
dc.rights.accessrightsOpenAccessen_NZ
dc.subjectAthletic performance; Kinetics; Exercise test
dc.titleRelationship Between Pedal Force Asymmetry and Performance in Cyclingen_NZ
dc.typeJournal Article
pubs.elements-id193717
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Health & Environmental Science
pubs.organisational-data/AUT/Health & Environmental Science/SPRINZ
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