David Jacobson
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Born : 1965
Cat. M60 Ultrarunner since 1990
19
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
28
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
1
Countries visited ?South Africa
South Africa27,1%
Rank quotient ?This runner's calculation uses 19 eligible race(s): Σ(rank − 1) = 25 463; Σ finishers = 93 811. 25 463 / 93 811 × 100 = 27.14%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed19
Km — ultra races1 121 km
Longest race89,0 km
78th Comrades Marathon - Down Run (RSA) — 16/6/2003
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road95,5%
Trail4,5%
Records
HISTORY
19 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 16/6/2003 | 78th Comrades Marathon - Down Run (RSA) | 89,00 | ×3 |
| ✓ 2 | 16/6/2001 | 76th Comrades Marathon - Down Run (RSA) | 89,00 | ×3 |
| ✓ 3 | 16/6/2004 | 79th Comrades Marathon - Up Run (RSA) | 87,00 | ×3 |
| ✓ 4 | 16/6/2000 | 75th Comrades Marathon - Up Run (RSA) | 87,00 | ×3 |
| ✓ 5 | 3/4/1999 | 30th Two Oceans Marathon | 56,00 | ×2 |
| ✓ 6 | 11/4/1998 | 29th Two Oceans Marathon | 56,00 | ×2 |
| ✓ 7 | 14/4/1990 | 21st Two Oceans Marathon | 56,00 | ×2 |
| ✓ 8 | 10/5/2014 | 1st Merrell Whale of Trail | 51,00 | ×1 |
| ✓ 9 | 16/4/2016 | 30th Loskop Ultra Marathon 50km | 50,00 | ×1 |
| ✓ 10 | 18/4/2015 | 29th Loskop Ultra Marathon 50km | 50,00 | ×1 |
| ✓ 11 | 16/4/2011 | 25th Loskop Ultra Marathon 50km | 50,00 | ×1 |
| ✓ 12 | 17/4/2010 | 24th Loskop Ultra Marathon 50km | 50,00 | ×1 |
| ✓ 13 | 18/4/2009 | 23th Loskop Ultra Marathon 50km | 50,00 | ×1 |
| ✓ 14 | 19/4/2008 | 22th Loskop Ultra Marathon 50km | 50,00 | ×1 |
| ✓ 15 | 23/4/2005 | 19th Loskop Ultra Marathon 50km | 50,00 | ×1 |
| ✓ 16 | 19/3/2005 | 15th Om Die Dam 50km | 50,00 | ×1 |
| ✓ 17 | 20/3/2004 | 14th Om Die Dam 50km (RSA) | 50,00 | ×1 |
| ✓ 18 | 15/3/2003 | 13th Om Die Dam 50km (RSA) | 50,00 | ×1 |
| ✓ 19 | 16/3/2002 | 12th Om Die Dam 50km (RSA) | 50,00 | ×1 |