Jan vs Martijn
NED · Open Men · 10 results Jan van Belzen
NED · Open Men · 6 results Martijn Grundmann
Station radar · best race with a field of 30 or more
Jan: Utrecht 2025, Open Men · Martijn: Amsterdam 2026, Open Men
This chart shows where Jan and Martijn sat in the field on each part of the race: the edge is faster than everyone, the centre is the slowest.Jan: strongest on Carry (faster than 99% of the field), weakest on Ski (faster than 15%).Martijn: strongest on Ski (faster than 94% of the field), weakest on Carry (faster than 30%).
See the numbers
| Part | Jan: faster than | Martijn: faster than |
|---|---|---|
| Ski | 15% | 94% |
| Push | 20% | 44% |
| Pull | 60% | 79% |
| BBJ | 46% | 44% |
| Row | 47% | 79% |
| Carry | 99% | 30% |
| Lunges | 70% | 49% |
| Wall balls | 30% | 54% |
| Roxzone | 47% | 82% |
| Runs | 73% | 69% |
Each athlete against their own field at their own best race (division, gender, that venue). Further out is faster.
Part by part
| Part | Jan | Martijn |
|---|---|---|
| SkiErg | 15% | 94% |
| Sled push | 20% | 44% |
| Sled pull | 60% | 79% |
| Burpee broad jump | 46% | 44% |
| Row | 47% | 79% |
| Farmers carry | 99% | 30% |
| Sandbag lunges | 70% | 49% |
| Wall balls | 30% | 54% |
| Roxzone (moving) | 47% | 82% |
| Runs (8 km) | 73% | 69% |
The share of their own field each athlete beat on that segment, at the race named on the left. Higher is better; green marks the better of the two. A dash means no split was published.
Those races as one bar each
This chart draws the race in order, left to right: each 1 km run (blue), each station (yellow) and the roxzone (grey), sized by its time.Jan · Utrecht 2025 · Open Men: 40:01 running, 39:28 at the stations and 5:50 in the roxzone; the longest station was the wall balls (8:36).Below, Martijn · Amsterdam 2026 · Open Men: 37:37 running, 35:32 at the stations and 5:28 in the roxzone; the longest station was the wall balls (6:49).
See the numbers
| Part | Jan · Utrecht 2025 · Open Men | Martijn · Amsterdam 2026 · Open Men |
|---|---|---|
| Run 1 | 4:46 | 3:44 |
| SkiErg | 4:50 | 4:04 |
| Run 2 | 5:01 | 4:33 |
| Sled push | 4:28 | 3:04 |
| Run 3 | 5:07 | 4:40 |
| Sled pull | 4:48 | 4:03 |
| Run 4 | 5:14 | 4:35 |
| Burpee broad jump | 5:55 | 5:38 |
| Run 5 | 5:10 | 4:50 |
| Row | 4:51 | 4:30 |
| Run 6 | 5:05 | 4:52 |
| Farmers carry | 1:27 | 2:16 |
| Run 7 | 5:24 | 4:54 |
| Sandbag lunges | 4:33 | 5:08 |
| Run 8 | 4:14 | 5:29 |
| Wall balls | 8:36 | 6:49 |
| Roxzone | 5:50 | 5:28 |
| Finish | 1:25:11 | 1:18:30 |
Head to head: 3 races they both ran
| Race | Jan | Martijn | Gap |
|---|---|---|---|
| Utrecht 2025 Open Men · 28 Nov 2025 | 1:25:11 | 1:25:09 | 0:02 · Martijn faster |
| Heerenveen 2025 Doubles Men · 10 May 2025 | 1:09:46 | 1:07:38 | 2:08 · Martijn faster |
| Amsterdam 2024 Open Men · 10 Oct 2024 | 1:32:56 | 1:22:52 | 10:04 · Martijn faster |
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