Jan Duk

Born : 1981 Cat. M45 Ultrarunner since 2015

DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.

DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details

Countries visited ?

China

Croatia

Czechia

Spain

Greece

Morocco

23,2%

Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 607; Σ finishers = 2 611. 607 / 2 611 × 100 = 23.25%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed18

Km — ultra races1 491 km

> 100 km3

> 160 km2

> 200 km2

> 24h2

Longest race246,0 km

35. Spartathlon — 29/9/2017

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road71,1%

Trail13,0%

Stage15,9%

Wins & podiums (ultra)

🏆 Win1

🏆 Win M1

🏅 Top 32

🏅 Top 3 M2

Longest winning streak1

Current streak0

Records

50 km3h58'53 100 km7h37'40 24 h95,86 km

HISTORY

13 race(s) · 3 split(s) nested

Date		Race	Perf.	Rk
2018
26.10	50km	1st Changan Ford Ultra Challenge 50km	3:58:53 h	22
08.09	100km	Cro100 - total (WC,WMA,open)	8:08:10 h	91
08.09	100km	WMA 100km, Sveti Martin	8:08:10 h	49
08.09	100km	30. IAU 100km WC, Sveti Martin	8:08:10 h	86
08.04	237km/6stages	33. Marathon des Sables Maroc	25:24:13 h	15
2017
16.12	24h	24 hores d'Ultrafons en pista - Barcelona	95.856 km	106
16.12	12h	24 hores d'Ultrafons en pista - Barcelona - 12h split	95.856 km	67
29.09	246km	35. Spartathlon	31:09:00 h	66
22.07	24h	Self-Transcendence Race 24 Std. Kladno	68.000 km	65
22.07	6h	Self-Transcendence Race 24 Std. Kladno - 6h Split	66.000 km	3 🥉
22.07	12h	Self-Transcendence Race 24 Std. Kladno - 12h Split	68.000 km	62
25.03	100km	Běhu na 100 km Pilsen	7:37:40 h	3 🥉
2016
27.11	100km	100km Los Alcazares, combined IAU & WMA & open race	7:45:46 h	71
27.11	100km	100km Los Alcazares, open race	7:45:46 h	1 🏆
2015
04.12	130.9km	22. Prazska Stovka - Prager Ultratrail	20:35:47 h	37
03.10	63km	Šumavský Ultra Trail	6:46:51 h	8

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Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	29/9/2017	35. Spartathlon	246,00	×7
✓ 2	8/4/2018	33. Marathon des Sables Maroc	237,00	×7
✓ 3	4/12/2015	22. Prazska Stovka - Prager Ultratrail	130,90	×4
✓ 4	8/9/2018	Cro100 - total (WC,WMA,open)	100,00	×3
✓ 5	25/3/2017	Běhu na 100 km Pilsen	100,00	×3
✓ 6	27/11/2016	100km Los Alcazares, combined IAU & WMA & open race	100,00	×3
✓ 7	16/12/2017	24 hores d'Ultrafons en pista - Barcelona	95,86	×2
✓ 8	22/7/2017	Self-Transcendence Race 24 Std. Kladno	68,00	×2
✓ 9	3/10/2015	Šumavský Ultra Trail	63,00	×1
✓ 10	26/10/2018	1st Changan Ford Ultra Challenge 50km	50,00	×1