In 1925 the women’s national record in javelin throw was introduced. Simmelink set the first javelin throw national record, after winning the javelin throw event at the national competition in Hengelo with a distance of 28.24 metres on 26 July 1925. In 1926, she became again javelin throw champion of Twente. She also won the bronze medal in the 100 metres, losing from Bets ter Horst. She improved her own national record on 24 July 1927 at the championships of Twente. A year later on 2 September 1928, she became Dutch national champion, beating her own national record with a distance 29.31 metres. She lost her record to Leny Rombout on 15 July 1929.