Alterations in running economy and mechanics after maximal cycling in triathletes: influence of performance level

Details

Serval ID
serval:BIB_4D8870B2B78D
Type
Article: article from journal or magazin.
Collection
Publications
Title
Alterations in running economy and mechanics after maximal cycling in triathletes: influence of performance level
Journal
International Journal of Sports Medicine
Author(s)
Millet G.P., Millet G.Y., Hofmann M.D., Candau R.B.
ISSN
0172-4622
Publication state
Published
Issued date
2000
Peer-reviewed
Oui
Volume
21
Number
2
Pages
127-132
Language
english
Abstract
The effects of the triathlon performance level on the metabolic and mechanical alterations in running after an exhaustive cycling exercise were studied. Eight elite and 18 middle-level triathletes completed two 7 min runs on a treadmill at a velocity corresponding to that sustained during a triathlon before and after maximal cycling exercise. Energy cost of running was quantified during the last minute of each run from the net oxygen uptake. External mechanical cost was quantified during the last minute of each run from displacements of the centre of mass using a kinematic arm. The effect of cycling on the running energy cost differed when comparing the elite (from 4.01+/-0.46 to 3.86+/-0.34J x kg(-1) x m(-1)) and the middle-level triathletes (from 3.67+/-0.37 to 3.76+/-0.39 x kg(-1) x m(-1) (P<0.01). The effect of cycling on the respiratory muscle O2 was more important (P<0.05) for the middle-level (from 120.1+/-27.2 to 166.4+/-47.8 ml x min(-1)) than for elite triathletes (from 124.5 +/- 24.5 to 143.7 +/- 28.9 ml x min(-1)). A tendency to a decrease of the mechanical cost and of the vertical displacement of the centre of mass during the braking phase was observed for the elite triathletes, suggesting a better leg stiffness regulation than for their less successful counterparts.
Keywords
Adult, Bicycling/physiology, Biomechanics, Female, Humans, Male, Muscle Fatigue/physiology, Oxygen Consumption, Physical Endurance/physiology, Respiration, Running/physiology
Pubmed
Web of science
Create date
25/09/2008 9:01
Last modification date
20/08/2019 15:02
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