Joost Siemensma
Netherlands (NED)
October 1972 (M50)
Personal Records
| 500m | 42,14 | 27 January 1995 | Utrecht (NED) |
| 1000m | 1.27,72 | 9 December 1994 | Utrecht (NED) |
| 1500m | 2.15,00 | 24 March 1994 | Utrecht (NED) |
| 3000m | 4.55,85 | 6 February 1994 | Utrecht (NED) |
Season Bests
| 100m | 12,20 | 20 October 2025 | Heerenveen (NED) |
| 300m | 31,27 | 20 October 2025 | Heerenveen (NED) |
| 500m | 49,01 | 8 December 2025 | Heerenveen (NED) |
| 700m | 1.13,68 | 8 February 2026 | Utrecht (NED) |
| 1000m | 1.37,97 | 8 December 2025 | Heerenveen (NED) |
| 1500m | 2.41,21 | 26 October 2025 | Utrecht (NED) |
| 100m | 12,12 | 4 March 2025 | Utrecht (NED) |
| 300m | 30,82 | 4 March 2025 | Utrecht (NED) |
| 500m | 48,81 | 23 February 2025 | Utrecht (NED) |
| 700m | 1.10,69 | 9 February 2025 | Utrecht (NED) |
| 1000m | 1.41,16 | 23 February 2025 | Utrecht (NED) |
| 1500m | 2.36,53 | 2 March 2025 | Utrecht (NED) |
| 500m | 47,40 | 7 November 2015 | Utrecht (NED) |
| 500m | 45,34 | 10 November 2013 | Utrecht (NED) |
| 500m | 45,78 | 23 December 2012 | Utrecht (NED) |
| 1000m | 1.40,94 | 13 October 2012 | Utrecht (NED) |
| 500m | 45,70 | 4 December 2010 | Utrecht (NED) |
| 1500m | 2.31,04 | 13 November 2010 | Utrecht (NED) |
| 500m | 46,25 | 9 February 2010 | Heerenveen (NED) |
| 1500m | 2.39,71 | 27 December 2009 | Utrecht (NED) |
| 500m | 45,38 | 15 February 2009 | Utrecht (NED) |
| 1000m | 1.34,83 | 15 February 2009 | Utrecht (NED) |
| 1500m | 2.26,77 | 3 February 2009 | Heerenveen (NED) |
| 3000m | 5.23,88 | 3 February 2009 | Heerenveen (NED) |
| 500m | 45,73 | 29 December 2007 | Utrecht (NED) |
| 1000m | 1.36,49 | 27 October 2007 | Utrecht (NED) |
Results
| Zondagmiddag/avond ANS Wedstrijd | Utrecht (NED) | 1 March 2026 | ||||||||||||
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| Zondagmiddag/avond | Utrecht (NED) | 8 February 2026 | ||||||||||||
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| Baankampioenschappen Utrecht Afstanden | Utrecht (NED) | 1 February 2026 | ||||||||||||
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| Zondagmiddag/avond | Utrecht (NED) | 25 January 2026 | ||||||||||||
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| ClubKampioenschappen GHV-IJBM | Utrecht (NED) | 17 January 2026 | ||||||||||||
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Native Language Names