Ad Voortman

Born : 1950 Cat. M75 Ultrarunner since 1997

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 ?

Belgium

Netherlands

South Africa

25,9%

Rank quotient ?This runner's calculation uses 14 eligible race(s): Σ(rank − 1) = 5 448; Σ finishers = 21 011. 5 448 / 21 011 × 100 = 25.93%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed14

Km — ultra races931 km

Longest race100,0 km

IAU 100km WC (RUN Winschoten 100 km) — 13/9/1997

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road86,8%

Trail13,2%

Records

100 km10h36'40 6 h64,58 km

HISTORY

14 race(s) · 1 split(s) nested

Date		Race	Perf.	Rk
2009
01.03	6h	14de Zes uurs ultraloop Stein	52.628 km	138
2007
07.10	6h	6h Ultraloop Amersfoort	53.687 km	27
2000
15.07	6h	6 uren van de Haarlemmermeer	52.745 km	17
16.06	87km road race	75th Comrades Marathon - Up Run	9:21:49 h	4707
14.05	6h	2e Zes uurloop Breda ValkenbergRUN	59.555 km	30
01.05	60km	1. 60 km van Gistel	5:38:14 h	29
1999
01.05	6h	De Zes Uren van Gistel	64.575 km	24
1998
27.12	6h	De Zes Uren van Epe	50.740 km	11
04.10	6h	6h Ultraloop Amersfoort	63.890 km	18
1997
09.11	62.5km	20e Ultraloop om de Haarlemmermeer	5:50:10 h	57
13.09	100km	IAU 100km WC (RUN Winschoten 100 km)	10:36:40 h	145
13.09	100km	22. RUN Winschoten 100 km - open race	10:36:40 h	175
31.03	60km	4e De Zestig van Texel	5:38:25 h	48
02.03	6h	2de Zes uurs ultraloop Stein	63.511 km	36
02.03	50km	2de Zes uurs ultraloop Stein - 50km Split	4:39:43 h	39

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Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	13/9/1997	IAU 100km WC (RUN Winschoten 100 km)	100,00	×3
✓ 2	16/6/2000	75th Comrades Marathon - Up Run (RSA)	87,00	×3
✓ 3	1/5/1999	De Zes Uren van Gistel	64,58	×2
✓ 4	4/10/1998	6h Ultraloop Amersfoort	63,89	×2
✓ 5	2/3/1997	2de Zes uurs ultraloop Stein	63,51	×2
✓ 6	9/11/1997	20e Ultraloop om de Haarlemmermeer	62,50	×2
✓ 7	1/5/2000	1. 60 km van Gistel	60,00	×2
✓ 8	31/3/1997	4e De Zestig van Texel	60,00	×2
✓ 9	14/5/2000	2e Zes uurloop Breda ValkenbergRUN	59,56	×2
✓ 10	7/10/2007	6h Ultraloop Amersfoort	53,69	×2
✓ 11	15/7/2000	6 uren van de Haarlemmermeer	52,75	×2
✓ 12	1/3/2009	14de Zes uurs ultraloop Stein	52,63	×2
✓ 13	27/12/1998	De Zes Uren van Epe	50,74	×1