| Athletes |
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Biographical data for: Marijn WIERSMA
| Classifications in season 2018/2019: |
| 16/09/18 | Heerenveen NED | KNSB Cup 1 | Divisie C | | Overall Ranking: 7th, 500 meter: 7th | | 19/10/18 | Bormio ITA | Alta Valtellina Trophy | SENIOR LAD | | Overall Ranking: 8th, 500 meter: 13th, 1500 meter: 3rd | | 04/01/19 | Heerenveen NED | Trials WKJ | Dames. | | Overall Ranking: 1st, 6 laps TT: 3rd, 1000 meter: 1st | | 04/01/19 | Heerenveen NED | Trials WKJ | Dames | | Overall Ranking: 3rd, 2 laps FS: 2nd, 3 laps TT: 4th, 500 meter: 3rd | | 04/01/19 | Heerenveen NED | Trials WKJ | Dames.. | | Overall Ranking: 4th, 9 laps TT: 1st, 1500 meter: 4th | | 05/01/19 | Heerenveen NED | National Championships Netherlands | Dames | | Overall Ranking: 8th, 500 meter: 11th, 1000 meter: 7th, 1500 meter: 7th | | 25/01/19 | Montreal CAN | World Junior Championships | Ladies | | 1000 m: 17th, 1500 m: 19th | | 08/02/19 | Bergamo ITA | Starclass 6 (SAB-3) | Ladies Jun.A+Senior | | Overall Ranking: 1st, 500 meter: 5th, 1000 meter: 1st, 1500 meter: 2nd | | 16/03/19 | Leeuwarden NED | National Junior Championships Netherlands | Dames Junioren A | | Overall Ranking: 1st, 500 meter: 2nd, 1000 meter: 1st, 1500 meter: 1st | | 22/03/19 | Rostock GER | ISU Junior Challenge Series European Final | Ladies Junior A | | Overall Ranking: 6th, 500 meter: 7th, 1000 meter: 5th, 1500 meter: 7th |
| Results in season 2018/2019: |
| 222 meter |
| 18 | .690 | 06/01/19 | Heerenveen NED | Trials WKJ | Heats | |
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| 333 meter |
| 32 | .128 | 04/01/19 | Heerenveen NED | Trials WKJ | Heats | |
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| 500 meter |
| 45 | .937 | 05/01/19 | Heerenveen NED | Trials WKJ | Finale, A | |
| 46 | .117 | 16/09/18 | Heerenveen NED | KNSB Cup 1 | Finale, Groep 2 | |
| 46 | .220 | 13/10/18 | Heerenveen NED | Invitation Cup | Semi Final | |
| 46 | .520 | 14/10/18 | Heerenveen NED | Invitation Cup | Super Final |  |
| 46 | .668 | 26/01/19 | Montreal CAN | World Junior Championships | Ranking Finals Preliminaries | |
| 46 | .819 | 16/09/18 | Heerenveen NED | KNSB Cup 1 | Halve Finales, Groep 1 | |
| 46 | .911 | 22/03/19 | Rostock GER | ISU Junior Challenge Series European Final | Quarter Finals, group A | |
| 46 | .915 | 05/01/19 | Heerenveen NED | National Championships Netherlands | Kwart finale | |
| 47 | .106 | 16/09/18 | Heerenveen NED | KNSB Cup 1 | Heats, Groep 1 | |
| 47 | .210 | 17/03/19 | Leeuwarden NED | National Junior Championships Netherlands | Finale, A | |
| 47 | .280 | 25/01/19 | Montreal CAN | World Junior Championships | Preliminaries | |
| 47 | .284 | 23/03/19 | Rostock GER | ISU Junior Challenge Series European Final | Semi Final, group A | |
| 47 | .293 | 06/01/19 | Heerenveen NED | National Championships Netherlands | Ranking finale, Gr.1 | |
| 47 | .870 | 08/02/19 | Bergamo ITA | Starclass 6 (SAB-3) | Quarter Finals, Group A | |
| 48 | .554 | 17/03/19 | Leeuwarden NED | National Junior Championships Netherlands | Halve Finale | |
| 57 | .277 | 09/02/19 | Bergamo ITA | Starclass 6 (SAB-3) | Final, Group A | |
| 1:08 | .546 | 23/03/19 | Rostock GER | ISU Junior Challenge Series European Final | Final, group B | |
| 1:10 | .805 | 09/02/19 | Bergamo ITA | Starclass 6 (SAB-3) | Semi Finals, Group A | |
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| 666 meter |
| 1:02 | .256 | 04/01/19 | Heerenveen NED | Trials WKJ | Heats | |
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| 1000 meter |
| 1:32 | .797 | 27/01/19 | Montreal CAN | World Junior Championships | Heats | |
| 1:32 | .875 | 05/01/19 | Heerenveen NED | National Championships Netherlands | Kwart finale | |
| 1:35 | .054 | 04/01/19 | Heerenveen NED | Trials WKJ | Heats | |
| 1:35 | .117 | 27/01/19 | Montreal CAN | World Junior Championships | Quarterfinals | |
| 1:37 | .001 | 13/10/18 | Heerenveen NED | Invitation Cup | Semi Final | |
| 1:37 | .191 | 25/01/19 | Montreal CAN | World Junior Championships | Preliminaries | |
| 1:37 | .269 | 06/01/19 | Heerenveen NED | Trials WKJ | Finale, A | |
| 1:37 | .329 | 10/02/19 | Bergamo ITA | Starclass 6 (SAB-3) | Semi Finals, Group A | |
| 1:39 | .455 | 09/02/19 | Bergamo ITA | Starclass 6 (SAB-3) Error performing query 1a | | | |
