Jan-Olof Jonasson
External sources
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Born : 1974
Cat. M50 Ultrarunner since 2023
6
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
20
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 ?Sweden
Sweden61,3%
Rank quotient ?This runner's calculation uses 6 eligible race(s): Σ(rank − 1) = 1 972; Σ finishers = 3 218. 1 972 / 3 218 × 100 = 61.28%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed6
Km — ultra races504 km
> 100 km1
> 24h4
Longest race100,6 km
5 Backyard Ultra Ljungby — 27/9/2025
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail36,1%
Elim.63,9%
Records
HISTORY
6 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 01.08 | Backyard Ultra | 5 Personliga Rekordens Backyard |
60.354 km (9h) | 45 |
| 2025 | ||||
| 27.09 | Backyard Ultra | 5 Backyard Ultra Ljungby |
100.590 km (15h) | 11 |
| 16.08 | 92km | 11th Ultravasan90 |
13:10:40 h | 1017 |
| 2024 | ||||
| 05.10 | Backyard Ultra | 3. Backyard Ultra Ljungby |
80.472 km (12h) | 18 |
| 17.08 | 90km | 10th Ultravasan90 |
13:20:21 h | 863 |
| 2023 | ||||
| 07.10 | Backyard Ultra | 3. Backyard Ultra Ljungby |
80.472 km (12h) | 24 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 27/9/2025 | 5 Backyard Ultra Ljungby | 100,59 | ×5 |
| ✓ 2 | 16/8/2025 | 11th Ultravasan90 | 92,00 | ×4 |
| ✓ 3 | 17/8/2024 | 10th Ultravasan90 | 90,00 | ×4 |
| ✓ 4 | 5/10/2024 | 3. Backyard Ultra Ljungby | 80,47 | ×4 |
| ✓ 5 | 7/10/2023 | 3. Backyard Ultra Ljungby | 80,47 | ×4 |
| ✓ 6 | 1/8/2026 | 5 Personliga Rekordens Backyard | 60,35 | ×3 |