- Descrizione: Jesper Kenn Olsen è un "ultra distance runner" che in 22 mesi, e più precisamente dal 1. gennaio 2004 al 23 ottobre 2005, ha percorso il giro del mondo. Il tragitto lo ha portato da Londra a Copenhagen, Mosca, Vladivostok, Niigata, Tokyo, Sydney, Perth, Los Angeles, Vancouver, New York, Shannon, Dublin, Liverpool e di nuovo a Londra. In totale ha corso per 26'000 chilometri
- 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.