She threw the javelin at the 2004 Summer Olympics and the 2008 Summer Olympics, but failed to qualify for the finals. Her biggest success was at the 2005 World Championships in Helsinki, where she threw a javelin 63.43 m, placing fourth overall in the event. She finished second at the 2003 World University games, sixth at the 2005 World Athletics Final, fifth at the 2006 European Championships and third at the 2006 World Athletics Final.
She holds the current Danish record with 64.83 metres, achieved at the 2006 World Athletics Final in September 2006.
Scherwin was the Danish national champion in the event in 2000, 2002, 2003, 2004, 2005, 2006 and 2008. She represents Sparta.
|1993||European Junior Championships||San Sebastián, Spain||6th||53.48 m|
|1994||World Junior Championships||Lisbon, Portugal||5th||55.70 m|
|2002||European Championships||Munich, Germany||18th (q)||50.51 m|
|2003||Universiade||Daegu, South Korea||2nd||56.08 m|
|2004||Olympic Games||Athens, Greece||29th (q)||56.86 m|
|2005||World Championships||Helsinki, Finland||4th||63.43 m (=NR)|
|2006||European Championships||Gothenburg, Sweden||5th||61.81 m|
|2008||Olympic Games||Beijing, China||44th (q)||53.95 m|