| Athletes |
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Biographical data for: Ief STRAATHOF
| Classifications in season 2017/2018: |
| 14/10/17 | Turnhout BEL | Opening Games | Girls Junior E/F | | Overall Ranking: 15th, 222 meter: 14th, 333 meter: 15th | | 18/11/17 | Utrecht NED | Regio West Sebra Sports Cup 1 | Pupillen 3 | | Overall Ranking: 13th, 333 meter: 13th | | 30/12/17 | Den Haag NED | Regio West Sebra Sports Cup 2 | Pupillen 3 | | Overall Ranking: 14th, 333 meter: 14th | | 20/01/18 | Dordrecht NED | Regio West Sebra Sports Cup 3 | Pupillen 3 | | Overall Ranking: 15th, 500 meter: 15th | | 28/01/18 | Hoorn NED | Regio West Sebra Sports Cup 4 | Pupillen 3 | | Overall Ranking: 14th, 500 meter: 14th | | 03/02/18 | Enschede NED | Twente Bokaal | Meisjes Pupillen 3 | | Overall Ranking: 16th, 222 meter: 16th, 333 meter: 16th | | 10/03/18 | Leiden NED | Arie Ravensbergen Bokaal | Meisjes Pupillen 3 | | Overall Ranking: 10th, 222 meter: 12th | | 31/03/18 | Gent BEL | Easter Tournament 38th | Girls Junior E/F | | Overall Ranking: 16th, 222 m: 18th, 333 m: 15th | | 07/04/18 | Turnhout BEL | Closing Games | Girls Junior E/F | | Overall Ranking: 16th, 222 meter: 15th, 333 meter: 17th |
| Results in season 2017/2018: |
| 222 meter |
| 35 | .07 | 10/03/18 | Leiden NED | Arie Ravensbergen Bokaal | Heats, Groep 1 | |
| 35 | .479 | 31/03/18 | Gent BEL | Easter Tournament 38th | Heats, Group 1 | |
| 35 | .60 | 10/03/18 | Leiden NED | Arie Ravensbergen Bokaal | Halve Finales, Groep 2 | |
| 35 | .84 | 10/03/18 | Leiden NED | Arie Ravensbergen Bokaal | Finale, Groep 3 | |
| 36 | .101 | 07/04/18 | Turnhout BEL | Closing Games | Final, Group 4 | |
| 36 | .42 | 03/02/18 | Enschede NED | Twente Bokaal | Heats, Group 1 | |
| 36 | .46 | 03/02/18 | Enschede NED | Twente Bokaal | Finale, Group 3 | |
| 36 | .50 | 03/02/18 | Enschede NED | Twente Bokaal | Halve Finale, Group 2 | |
| 37 | .39 | 28/01/18 | Hoorn NED | Regio West Sebra Sports Cup 4 | Heats, Groep 1 | |
| 38 | .933 | 07/04/18 | Turnhout BEL | Closing Games | Heats, Group 1 | |
| 39 | .88 | 30/12/17 | Den Haag NED | Regio West Sebra Sports Cup 2 | Heats, Groep 1 | |
| 40 | .35 | 18/11/17 | Utrecht NED | Regio West Sebra Sports Cup 1 | Heats, Groep 1 | |
| 41 | .312 | 14/10/17 | Turnhout BEL | Opening Games | Heats, Group 1 | |
| 42 | .800 | 14/10/17 | Turnhout BEL | Opening Games | Final, Group 4 | |
| 42 | .87 | 20/01/18 | Dordrecht NED | Regio West Sebra Sports Cup 3 | Heats, Groep 1 | |
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| 333 meter |
| 52 | .50 | 10/03/18 | Leiden NED | Arie Ravensbergen Bokaal | Super Final, Groep 3 | |
| 52 | .919 | 31/03/18 | Gent BEL | Easter Tournament 38th | Heats, Group 1 | |
| 53 | .350 | 31/03/18 | Gent BEL | Easter Tournament 38th | Final, Group 4 | |
| 54 | .033 | 31/03/18 | Gent BEL | Easter Tournament 38th | Semi Finals, Group 2 | |
| 54 | .40 | 03/02/18 | Enschede NED | Twente Bokaal | Finale, Group 4 | |
| 54 | .552 | 07/04/18 | Turnhout BEL | Closing Games | Heats, Group 1 | |
| 56 | .03 | 20/01/18 | Dordrecht NED | Regio West Sebra Sports Cup 3 | Halve Finale, Groep 2 | |
| 58 | .25 | 30/12/17 | Den Haag NED | Regio West Sebra Sports Cup 2 | Halve Finale, Groep 2 | |
| 1:00 | .82 | 30/12/17 | Den Haag NED | Regio West Sebra Sports Cup 2 | Finale, Groep 3 | |
| 1:01 | .399 | 07/04/18 | Turnhout BEL | Closing Games | Final, Group 4 | |
| 1:01 | .81 | 18/11/17 | Utrecht NED | Regio West Sebra Sports Cup 1 | Halve Finale, Groep 2 | |
| 1:02 | .918 | 14/10/17 | Turnhout BEL | Opening Games | Final, Group 4 | |
| 1:03 | .797 | 14/10/17 | Turnhout BEL | Opening Games | Heats, Group 1 | |
| 1:04 | .17 | 18/11/17 | Utrecht NED | Regio West Sebra Sports Cup 1 | Finale, Groep 4 | |
| 1:20 | .48 | 28/01/18 | Hoorn NED | Regio West Sebra Sports Cup 4 | Halve Finale, Groep 2 | |
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| 500 meter |
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| 2000 meter relay |
| 4:19 | .617 | 07/04/18 | Turnhout BEL | Closing Games | Final, Group 1 | |
| (IHC Leiden: Stan de Graaf, Pom Straathof, Ief Straathof, Julie van Santen) |
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