Effects of drafting on energy expenditure in in-line skating

Détails

ID Serval
serval:BIB_0A7340B3C046
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Effects of drafting on energy expenditure in in-line skating
Périodique
Journal of sports Medicine and Physical Fitness
Auteur⸱e⸱s
Millet G.P., Geslan R., Ferrier R., Candau R., Varray A.
ISSN
0022-4707
Statut éditorial
Publié
Date de publication
09/2003
Peer-reviewed
Oui
Volume
43
Numéro
3
Pages
285-290
Langue
anglais
Notes
Publication types: Journal Article
Résumé
AIM: The purpose of this study was to measure the effects of drafting on energy expenditure in in-line skating, and to investigate whether the "benefit of drafting", i.e. the decrease in energy expenditure, was different between two velocities and two distances separating the two skaters. METHODS: Eight recreational in-line skaters performed six exercises of 6 min, at 2 velocities (V(1) = 5.51+/-0.45 m x sec(-1); V(2) = 7.01+/-0.67 m x sec(-1)) in 3 conditions (ND = without drafting; D(1)=0.74-0.87 m "close"; D(2) = 1.19-1.36 m "far"). Collection of expired gas was carried out using a breath-by-breath portable gas analyser K4(b2) and the distance between the skaters was measured by video analysis. RESULTS: The skaters' energy expenditure was reduced in all drafting conditions; between D(1) and ND by 9.6+/-4.4% at V(1) and by 2.7+/-3.3% at V(2); between D(2) and ND by 8.8+/-6.0% at V(1) and by 4.2+/-4.8% at V(2). This reduction was significantly (p<0.05) more important at V(1) than V(2) and no differences were observed between D(1) and D(2). CONCLUSION: In in-line skating, the technical difficulties for drafting efficiently, especially while cornering, resulted in a reduced "benefit of drafting" at high velocity than in other sports. Moreover, the need for the subject to adjust their own cycle frequency to that of the lead skater while drafting "close" would explain partly that there were no significant differences between drafting at D(1) and D(2). These results suggest that the drafting technique should be emphasized in training, especially in non-skilled skaters at high velocities and when cornering.
Mots-clé
Adult, Air Movements, Biomechanics, Energy Metabolism/physiology, Exercise/physiology, Humans, Lactic Acid/blood, Male, Oxygen Consumption/physiology, Reference Values, Skating/physiology
Pubmed
Création de la notice
25/09/2008 8:01
Dernière modification de la notice
20/08/2019 12:32
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