Numerical investigation of the impact of Kenenisa Bekele's cooperative drafting strategy on its running power during the 2019 Berlin marathon

Copyright © 2020 Elsevier Ltd. All rights reserved..

In this paper we examined the aerodynamic drag and the resulting decrease of power output associated with the drafting positions used by Kenenisa Bekele at the 2019 Berlin marathon. Examination of videos of the race revealed three different positions adopted by Bekele directly behind a frontline of three runners. These drafting positions were numerically studied using CFD simulations performed with the RANS equations and the SST k-ω model. Depending on his position behind the pacers, our analyses indicated that Bekele's drafting strategy resulted in reductions of 38.5-57.3% of the drag resistance and aerodynamic power. In terms of metabolic power, Bekele's drafting positions yielded an estimated 1.91-2.84% reduction compared to the calculated metabolic power of 1427.89 W (or equivalent metabolic power relative to body mass of 25.50 W/kg) that Bekele would have developed if he had run alone at the same speed of 5.75 m.s-1.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:107

Enthalten in:

Journal of biomechanics - 107(2020) vom: 23. Juni, Seite 109854

Sprache:

Englisch

Beteiligte Personen:

Polidori, Guillaume [VerfasserIn]
Legrand, Fabien [VerfasserIn]
Bogard, Fabien [VerfasserIn]
Madaci, Farouk [VerfasserIn]
Beaumont, Fabien [VerfasserIn]

Links:

Volltext

Themen:

Aerodynamic
CFD
Drafting
Drag
Journal Article
Power
Running

Anmerkungen:

Date Completed 14.05.2021

Date Revised 14.05.2021

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.jbiomech.2020.109854

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM310972329