Koos Groenewold
Netherlands (NED)
October 1948 (M75)
Personal Records
| 500m | 43,10 | 8 February 1971 | Heerenveen (NED) |
| 1000m | 1.33,00 | 16 January 1974 | Deventer (NED) |
| 1500m | 2.17,41 | 7 November 2009 | Hoorn (NED) |
| 3000m | 4.49,06 | 8 December 2004 | Amsterdam (NED) |
| 5000m | 8.27,30 | 3 March 1970 | Heerenveen (NED) |
| 10000m | 19.48,10 | 2 February 1974 | Deventer (NED) |
Season Bests
| 1500m | 2.33,47 | 18 March 2016 | Amsterdam (NED) |
| 500m | 50,89 | 20 March 2015 | Amsterdam (NED) |
| 1500m | 2.30,38 | 20 March 2015 | Amsterdam (NED) |
| 500m | 48,29 | 21 March 2014 | Amsterdam (NED) |
| 1500m | 2.21,05 | 7 December 2013 | Hoorn (NED) |
| 500m | 46,62 | 17 November 2012 | Hoorn (NED) |
| 1500m | 2.18,24 | 17 November 2012 | Hoorn (NED) |
| 500m | 46,42 | 21 January 2012 | Heerenveen (NED) |
| 1500m | 2.18,40 | 21 January 2012 | Heerenveen (NED) |
| 500m | 46,56 | 7 November 2009 | Hoorn (NED) |
| 1500m | 2.17,41 | 7 November 2009 | Hoorn (NED) |
| 500m | 47,04 | 8 February 2009 | Amsterdam (NED) |
| 1500m | 2.18,67 | 22 November 2008 | Hoorn (NED) |
| 500m | 47,56 | 17 February 2008 | Amsterdam (NED) |
| 1500m | 2.21,05 | 17 February 2008 | Amsterdam (NED) |
| 3000m | 5.02,87 | 12 January 2008 | Hoorn (NED) |
Results
| Clubkampioenschappen Amstelbocht/Waterland | Amsterdam (NED) | 18 March 2016 | ||||||||
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| Clubkampioenschappen Amstelbocht / STG Waterland | Amsterdam (NED) | 20 March 2015 | ||||||||
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| CK Amstelbocht / Waterland | Amsterdam (NED) | 21 March 2014 | ||||||||
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| Amstelbocht en STG Waterland | Hoorn (NED) | 7 December 2013 | ||||||||
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| Amstelbocht / Waterland in Hoorn | Hoorn (NED) | 17 November 2012 | ||||||||
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Native Language Names