| Athletes |
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Biographical data for: Siem VAN SCHAIJK
| Classifications in season 2025/2026: |
| Results in season 2025/2026: |
| 500 meter |
| 51 | .32 | 24/01/26 | Dordrecht NED | Regional League NED West 4 - Sebra Sports Cup | Final, Group 1 | |
| 51 | .73 | 24/01/26 | Dordrecht NED | Regional League NED West 4 - Sebra Sports Cup | Quarter Finals, Group 1 | |
| 52 | .29 | 24/01/26 | Dordrecht NED | Regional League NED West 4 - Sebra Sports Cup | Semi Final, Group 1 | |
| 52 | .474 | 11/01/26 | Alkmaar NED | Regional League NED West 3 - Sebra Sports Cup | Quarter Finals, Group 1 | |
| 52 | .492 | 16/11/25 | Utrecht NED | Regional league NED West 1 - Sebra Sports Cup | Semi Final, Group 1 | |
| 52 | .57 | 22/11/25 | Den Haag NED | Regional League NED West 2 - Sebra Sports Cup | Quarter Finals, Group 1 | |
| 52 | .708 | 16/11/25 | Utrecht NED | Regional league NED West 1 - Sebra Sports Cup | Quarter Finals, Group 1 | |
| 52 | .895 | 16/11/25 | Utrecht NED | Regional league NED West 1 - Sebra Sports Cup | Final, Group 1 | |
| 53 | .728 | 11/01/26 | Alkmaar NED | Regional League NED West 3 - Sebra Sports Cup | Final, Group 2 | |
| 54 | .474 | 11/01/26 | Alkmaar NED | Regional League NED West 3 - Sebra Sports Cup | Semi Final, Group 1 | |
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| 1000 meter |
| 1:53 | .33 | 22/11/25 | Den Haag NED | Regional League NED West 2 - Sebra Sports Cup | Final, Group 2 | |
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| 2000 meter relay |
| 3:23 | .793 | 11/01/26 | Alkmaar NED | Regional League NED West 3 - Sebra Sports Cup | Final, Group 1 | |
| (Team 1: Maarten Pennings, Daan van Houten, Siem Van Schaijk, Bjorn Widlund) |
| 3:31 | .73 | 22/11/25 | Den Haag NED | Regional League NED West 2 - Sebra Sports Cup | Final, Group 1 | |
| (Team C: Elise Blokland, Vivienne Bodijn, Sebastiaan van Rhee, Siem Van Schaijk) |
| 3:33 | .080 | 16/11/25 | Utrecht NED | Regional league NED West 1 - Sebra Sports Cup | Final, Group 1 | |
| (Team M2: Anne-Lotte Kohler, Jolanda Nowee, Siem Van Schaijk, Matthijs Wijk) |
| 3:41 | .86 | 24/01/26 | Dordrecht NED | Regional League NED West 4 - Sebra Sports Cup | Final, Group 1 | |
| (Team 25: Zee De Kiefte, Ralph Kooloos, Siem Van Schaijk, Tije Van Zon) |
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