Marcin Grzemski
External sources
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Born : 1989
Cat. M35 Ultrarunner since 2025
5
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
16
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
3
Countries visited ?
ItalyPoland
Portugal
ItalyPolandPortugal11,6%
Rank quotient ?This runner's calculation uses 5 eligible race(s): Σ(rank − 1) = 203; Σ finishers = 1 746. 203 / 1 746 × 100 = 11.63%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed5
Km — ultra races303 km
Longest race71,0 km
Chojnik Karkonoski Festiwal Biegowy — 5/9/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail100,0%
Records
HISTORY
5 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 5/9/2026 | Chojnik Karkonoski Festiwal Biegowy | 71,00 | ×4 |
| ✓ 2 | 9/5/2026 | Ultra Trail del Lago di Como - UTLAC60 | 62,00 | ×3 |
| ✓ 3 | 6/9/2025 | 16. Bieg 7 dolin - Bieg na dystansie 61 km | 61,00 | ×3 |
| ✓ 4 | 26/4/2025 | 16. MIUT - Madeira Island Ultra Trail 60 km | 58,50 | ×3 |
| ✓ 5 | 9/11/2025 | Puglia by UTMB - Castellaneta Underground Trail | 50,00 | ×3 |