| Athletes |
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Biographical data for: Tamar KOOLWIJK
| Classifications in season 2022/2023: |
| 17/09/22 | Heerenveen NED | National League KNSB-Cup prologue | Divisie E | | Overall Ranking: 8th, 1000 meter: 8th | | 16/10/22 | Leeuwarden NED | National League KNSB Cup 1 | Divisie E | | Overall Ranking: 10th, 500 meter: 10th | | 29/10/22 | Groningen NED | Autumn Tournament | Women Junior-C | | Overall Ranking: 7th, 500 meter: 5th, 1000 meter: 8th | | 04/11/22 | Rostock GER | StarClass-1 (CD-1) | Women Junior C | | Overall Ranking: 11th, 500 meter: 7th, 1000 meter: 12th, 1500 meter: 14th | | 09/12/22 | Hasselt BEL | StarClass-3 (CD-2) | Women Junior C | | Overall Ranking: 19th, 500 meter: 21st, 1000 meter: 12th, 1500 meter: 25th | | 17/12/22 | Dordrecht NED | National League KNSB Cup 3 | Divisie D | | 1000 meter: 10th | | 04/02/23 | Nijmegen NED | National League KNSB Cup 5 | Divisie D | | Overall Ranking: 5th, 1500 meter: 5th | | 17/02/23 | Bergamo ITA | StarClass-4 (CD-3) | Women Junior C | | Overall Ranking: 14th, 500 meter: 12th, 1000 meter: 16th, 1500 meter: 10th | | 18/03/23 | Leeuwarden NED | National Championships Juniors NED | Meisjes Junioren C | | Overall Ranking: 6th, 500 meter: 6th, 1000 meter: 16th, 1500 meter: 7th | | 20/03/23 | Den Haag NED | Club Championships HVHW-DKYV (NED) | Junioren C/B/A - Sen | | Overall Ranking: 8th |
| Results in season 2022/2023: |
| 500 meter |
| 49 | .41 | 20/03/23 | Den Haag NED | Club Championships HVHW-DKYV (NED) | Kwart Finales, Groep 1 | |
| 49 | .500 | 19/03/23 | Leeuwarden NED | National Championships Juniors NED | Halve Finales | |
| 49 | .674 | 19/03/23 | Leeuwarden NED | National Championships Juniors NED | Finale, B | |
| 49 | .731 | 18/02/23 | Bergamo ITA | StarClass-4 (CD-3) | Semi Final, Group 2 | |
| 49 | .938 | 18/02/23 | Bergamo ITA | StarClass-4 (CD-3) | Quarter Finals, Group 1 | |
| 50 | .138 | 10/12/22 | Hasselt BEL | StarClass-3 (CD-2) | Semi Final, Group 3 | |
| 50 | .167 | 10/12/22 | Hasselt BEL | StarClass-3 (CD-2) | Final, Group 5 | |
| 50 | .323 | 17/02/23 | Bergamo ITA | StarClass-4 (CD-3) | Heats, Group 1 | |
| 50 | .342 | 19/03/23 | Leeuwarden NED | National Championships Juniors NED | Kwart Finales | |
| 50 | .364 | 09/12/22 | Hasselt BEL | StarClass-3 (CD-2) | Heats, Group 1 | |
| 50 | .41 | 20/03/23 | Den Haag NED | Club Championships HVHW-DKYV (NED) | Halve Finales, Groep 1 | |
| 50 | .471 | 18/02/23 | Bergamo ITA | StarClass-4 (CD-3) | Final, Group 3 |  |
| 50 | .600 | 05/11/22 | Rostock GER | StarClass-1 (CD-1) | Semi Final, Group 1 | |
| 50 | .687 | 05/11/22 | Rostock GER | StarClass-1 (CD-1) | Final, Group 2 | |
| 51 | .251 | 29/10/22 | Groningen NED | Autumn Tournament | Final, Group 1 | |
| 51 | .313 | 29/10/22 | Groningen NED | Autumn Tournament | Semi Final, Group 1 | |
| 51 | .689 | 04/11/22 | Rostock GER | StarClass-1 (CD-1) | Heats, Group 1 | |
| 51 | .777 | 16/10/22 | Leeuwarden NED | National League KNSB Cup 1 | Heats, Groep 1 | |
| 52 | .447 | 29/10/22 | Groningen NED | Autumn Tournament | Quarter Finals, Group 1 | |
| 1:11 | .085 | 16/10/22 | Leeuwarden NED | National League KNSB Cup 1 | Halve Finales, Groep 1 | |
| 1:12 | .158 | 16/10/22 | Leeuwarden NED | National League KNSB Cup 1 | Finale, Groep 2 | |
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| 1000 meter |
| 1:46 | .080 | 18/02/23 | Bergamo ITA | StarClass-4 (CD-3) | Heats, Group 1 | |
| 1:46 | .103 | 18/02/23 | Bergamo ITA | StarClass-4 (CD-3) | Quarter Finals, Group 1 | |
| 1:46 | .910 | 04/02/23 | Nijmegen NED | National League KNSB Cup 5 | Halve Finales, Groep 1 | |
| 1:47 | .121 | 29/10/22 | Groningen NED | Autumn Tournament | Final, Group 2 | |
| 1:47 | .365 | 17/02/23 | Bergamo ITA | StarClass-4 (CD-3) | Quarter Finals, Group 1 | |
| 1:47 | .494 | 17/09/22 | Heerenveen NED | National League KNSB-Cup prologue | Finale, Groep 2 | |
| 1:47 | .892 | 06/11/22 | Rostock GER | StarClass-1 (CD-1) | Semi Final, Group 2 | |
| 1:48 | .404 | 17/09/22 | Heerenveen NED | National League KNSB-Cup prologue | Kwart Finales, Groep 1 | |
| 1:48 | .721 | 10/12/22 | Hasselt BEL | StarClass-3 (CD-2) | Heats, Group 1 | |
| 1:49 | .169 | 17/09/22 | Heerenveen NED | National League KNSB-Cup prologue | Halve Finales, Groep 1 | |
| 1:49 | .279 | 10/12/22 | Hasselt BEL | StarClass-3 (CD-2) | Quarter Finals, Group 1 | |
| 1:49 | .559 | 17/12/22 | Dordrecht NED | National League KNSB Cup 3 | Halve Finales, Groep 1 | |
| 1:49 | .702 | 04/02/23 | Nijmegen NED | National League KNSB Cup 5 | Kwartfinales, Groep 1 | |
| 1:49 | .821 | 17/12/22 | Dordrecht NED | National League KNSB Cup 3 | Heats, Groep 1 | |
| 1:51 | .041 | 11/12/22 | Hasselt BEL | StarClass-3 (CD-2) | Final, Group 3 | |
| 1:56 | .20 | 20/03/23 | Den Haag NED | Club Championships HVHW-DKYV (NED) | Finale, Groep 2 | |
| 1:57 | .944 | 06/11/22 | Rostock GER | StarClass-1 (CD-1) | Final, Group 3 | |
| 1:59 | .718 | 11/12/22 | Hasselt BEL | StarClass-3 (CD-2) | Semi Final, Group 2 | |
| 2:04 | .137 | 18/03/23 | Leeuwarden NED | National Championships Juniors NED | Kwart Finales | |
| P | 17/12/22 | Dordrecht NED | National League KNSB Cup 3 | Finale, Groep 2 | |
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| 1500 meter |
| 2:45 | .519 | 19/03/23 | Leeuwarden NED | National Championships Juniors NED | Finale, A | |
| 2:45 | .668 | 19/03/23 | Leeuwarden NED | National Championships Juniors NED | Halve Finales | |
| 2:46 | .575 | 04/11/22 | Rostock GER | StarClass-1 (CD-1) | Final, Group 3 | |
| 2:47 | .178 | 17/02/23 | Bergamo ITA | StarClass-4 (CD-3) | Final, Group 2 | |
| 2:47 | .519 | 04/11/22 | Rostock GER | StarClass-1 (CD-1) | Heats, Group 1 | |
| 2:47 | .885 | 04/11/22 | Rostock GER | StarClass-1 (CD-1) | Semi Final, Group 2 | |
| 2:48 | .291 | 04/02/23 | Nijmegen NED | National League KNSB Cup 5 | Finale, Groep 1 | |
| 2:50 | .846 | 09/12/22 | Hasselt BEL | StarClass-3 (CD-2) | Final, Group 5 | |
| 2:55 | .066 | 17/02/23 | Bergamo ITA | StarClass-4 (CD-3) | Semi Final, Group 1 | |
| 2:56 | .495 | 09/12/22 | Hasselt BEL | StarClass-3 (CD-2) | Quarter Finals, Group 1 | |
| P | 09/12/22 | Hasselt BEL | StarClass-3 (CD-2) | Semi Final, Group 2 | |
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| 2000 meter relay |
| P | 04/02/23 | Nijmegen NED | National League KNSB Cup 5 | Finale, Groep 1 | |
| (Team A: Emma Arns, Tamar Koolwijk, Stefan Meijer, Luka Sterk) |
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| 3000 meter relay |
| 4:53 | .474 | 18/03/23 | Leeuwarden NED | National Championships Juniors NED | Halve Finales | |
| (DKIJV Delft: Iris Kleiweg, Tamar Koolwijk, Nina Loman, Louisa Loman) |
| 5:32 | .519 | 16/10/22 | Leeuwarden NED | National League KNSB Cup 1 | Finale, Groep 1 | |
| (DEF 8: Lisa Den Hertog, Tamar Koolwijk, Ishan Olden, Lieuwe Van Den Berg) |
| P | 17/09/22 | Heerenveen NED | National League KNSB-Cup prologue | Finale, Groep 1 | |
| (TEAM O: Tamar Koolwijk, Juliette van den Berg, Amber van der Heide, Stian van Etten) |
| P | 17/12/22 | Dordrecht NED | National League KNSB Cup 3 | Finale, Groep 1 | |
| (Team - F: Iris Kleiweg, Tamar Koolwijk, Toria Kruithof, Stefan Meijer) |
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