- Descriptif: Jesper Kenn Olsen est un 'coureur de ultra distance' qui, en 22 mois, et plus précisément du 1er janvier 2004 au 23 octobre 2005, a couru autour du monde. Son parcours l'a emmené de Londres à Copenhague, Moscou, Vladivostok, Niigata, Tokyo, Sydney, Perth, Los Angeles, Vancouver, New York, Shannon, Dublin, Liverpool et de nouveau à Londres. Au total, il a couru pour 26'000 kilomètres
- Alias-Pseudonimo-Pseudonyme: -
- Nationality-Nazionalità-Nationalité: Denmark, Danimarca
- Birth/death-Nascita/morte-Naissance/mort: -
- Means of transport-Mezzo di trasporto-Moyen de transport: On foot, A piedi, A pied
- Geographical description-Riferimento geografico-Référence géographique: Around the World, Giro del mondo, Tour du monde
- Internet: http://www.worldrun.org/m_therunners.php
- Wikidata: https://www.wikidata.org/wiki/Q6185873
- Additional references-Riferimenti complementari-Références complémentaires: Jesper Kenn Olsen, The Runner's Guide to the Planet: Two Laps Around the Earth : Impressions of Nature and Cultures, Anecdotes and Training Advice, Haase, 2014
The concept of Olsen's world run originated as a suggestion made in 2001 by Olsen to David Blaikie, who published it with an invitation for comments on his website ultramarathonworld.com. Olsen suggested that, without taking sides in then-current controversies in the ultra-running world, a professionally organized world run would be a "constructive" and "truly sportsman[like]" response to widespread ultrarunner community skepticism and discussion concerning Robert Garside's world run, which had been in progress since 1997 but was viewed with great skepticism by Blaikie and many ultra-runners and had not yet been authenticated by Guinness at the time.