Sieta Posthumus (born 22 April 1936) is a retired Dutch freestyle swimmer who participated in the 1960 Summer Olympics in the 4×100 m freestyle relay. Her team was expected to compete for medals, but was disqualified in the preliminary round[1] because she jumped in water while her team mate, Jopie Troost, had not yet completed her leg. During the warm up, Posthumus hit the wall of the pool with her head, and it was revealed later that she suffered a concussion. She retired from swimming six months after the Games.[2]

Sieta Posthumus

Cocky Gastelaars, Judith de Nijs, Sita Posthumus and Astrid Ording in 1959 after setting a national record in the 4×100 m freestyle relay
Personal information
Born	(1936-04-22) April 22, 1936 (age 86) Leeuwarden, the Netherlands
Height	1.61 m (5 ft 3 in)
Weight	59 kg (130 lb)
Sport
Sport	Swimming
Club	LZC '29, Leeuwarden

References

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