Sia Wai Yen

Sia Wai Yen (born 15 January 1984) is a Malaysian swimmer who specialised in long-distance freestyle and individual medley events.

She won four medals in two editions of the Southeast Asian Games (1999 and 2001), and later became a top 8 finalist at the 2002 Asian Games.

At the age of 16 she represented Malaysia at the 2000 Summer Olympics.

Sia competed in a medley double at the 2000 Summer Olympics in Sydney.

She achieved FINA B-standards of 2:20.64 (200 m individual medley) and 4:52.52 (400 m individual medley) from the Southeast Asian Games in Bandar Seri Begawan, Brunei.

On the first day of the Games she placed twenty-fifth in the 400 m individual medley.

In heat four, she finished at the bottom of the pack in a poor time of 4:59.18, more than six seconds slower than her national record.

Two days later, in the 200 m individual medley, Sia posted a time of 2:20.64 in heat two but finished in thirty-first place among 36 other swimmers from the prelims.

When her nation hosted the 2001 Southeast Asian Games in Kuala Lumpur, Sia won a gold in the 400 m individual medley (4:55.87), and a bronze in the 400 m freestyle (4:24.87) and 200 m individual medley (2:22.44).

At the 2002 Asian Games in Busan, South Korea, Sia finished seventh in the 400 m individual medley at 5:06.20, holding off a sprint freestyle race from Hong Kong's Chan Wing Suet by four-hundredths of a second (0.04).