Thirza Sierdsma
Netherlands (NED)
August 2000 (LN4)
Personal Records
| 500m | 42,40 | 18 December 2021 | Heerenveen (NED) |
| 1000m | 1.24,86 | 22 December 2019 | Leeuwarden (NED) |
| 1500m | 2.09,86 | 20 January 2020 | Heerenveen (NED) |
| 3000m | 4.38,45 | 18 November 2019 | Heerenveen (NED) |
Season Bests
| 500m | 42,40 | 18 December 2021 | Heerenveen (NED) |
| 1000m | 1.26,63 | 4 September 2021 | Heerenveen (NED) |
| 1500m | 2.11,62 | 18 December 2021 | Heerenveen (NED) |
| 100m | 11,99 | 6 January 2020 | Heerenveen (NED) |
| 300m | 27,77 | 6 January 2020 | Heerenveen (NED) |
| 500m | 43,06 | 6 January 2020 | Heerenveen (NED) |
| 1000m | 1.24,86 | 22 December 2019 | Leeuwarden (NED) |
| 1500m | 2.09,86 | 20 January 2020 | Heerenveen (NED) |
| 3000m | 4.38,45 | 18 November 2019 | Heerenveen (NED) |
| 500m | 43,83 | 3 December 2018 | Heerenveen (NED) |
| 1000m | 1.26,15 | 4 February 2019 | Heerenveen (NED) |
| 1500m | 2.12,74 | 9 December 2018 | Heerenveen (NED) |
| 3000m | 4.44,92 | 25 November 2018 | Heerenveen (NED) |
| 500m | 44,09 | 21 January 2018 | Heerenveen (NED) |
| 1000m | 1.26,45 | 3 March 2018 | Heerenveen (NED) |
| 1500m | 2.15,73 | 2 March 2018 | Heerenveen (NED) |
| 3000m | 4.45,83 | 3 March 2018 | Heerenveen (NED) |
| 100m | 12,00 | 29 January 2017 | Heerenveen (NED) |
| 300m | 28,07 | 29 January 2017 | Heerenveen (NED) |
| 500m | 43,24 | 4 March 2017 | Heerenveen (NED) |
| 1000m | 1.25,65 | 3 March 2017 | Heerenveen (NED) |
| 1500m | 2.11,89 | 4 March 2017 | Heerenveen (NED) |
| 3000m | 4.58,75 | 4 December 2016 | Heerenveen (NED) |
| 500m | 43,37 | 5 March 2016 | Heerenveen (NED) |
| 1000m | 1.25,84 | 26 February 2016 | Heerenveen (NED) |
| 1500m | 2.14,03 | 27 February 2016 | Heerenveen (NED) |
| 500m | 43,77 | 31 January 2015 | Heerenveen (NED) |
| 1000m | 1.28,29 | 31 January 2015 | Heerenveen (NED) |
| 1500m | 2.26,73 | 22 December 2014 | Heerenveen (NED) |
| 500m | 45,64 | 10 March 2014 | Heerenveen (NED) |
| 1000m | 1.32,06 | 8 March 2014 | Heerenveen (NED) |
| 500m | 48,01 | 18 March 2013 | Heerenveen (NED) |
| 500m | 53,64 | 19 March 2012 | Heerenveen (NED) |
Results
| Clubwedstrijd Pupillen t/m Masters | Heerenveen (NED) | 18 December 2021 | ||||||||
|
||||||||||
| Mass Start Competitie 4 | Deventer (NED) | 17 October 2021 | ||||||||
|
||||||||||
| Gewestelijke Wedstrijd Pupillen / A junioren en Ouder | Heerenveen (NED) | 11 October 2021 | ||||||||
|
||||||||||
| Thialf Simmer Cup | Heerenveen (NED) | 4 September 2021 | ||||||||
|
||||||||||
| Plaatsingswedstrijd 2 Holland Cup/IJsselcup | Heerenveen (NED) | 28 August 2021 | ||||||||
|
||||||||||
Native Language Names