Amuilka Joy (Joice) Maduaka[1] (born 30 September 1973) is a British track and field athlete, who competes over the 100, 200 and occasionally 400 metres.

She represented England and won a bronze medal in the 4 x 100 metres relay event, at the 1998 Commonwealth Games in Kuala Lumpur, Malaysia.

[4] There was a general improvement in the overall standard of women's sprinting in Britain and Maduaka was faced with domestic challenges from athletes such as Abi Oyepitan.

At the end of the year Maduaka was ranked as the fastest British athlete over 100 m and the second fastest over 200 m. At the 2007 AAA Championships she failed to defend her 100 m crown, finishing third behind Jeanette Kwakye, and also had to pull out of the final of the 200 m, despite winning her heat very convincingly, due to illness.

Maduaka and Jeanette Kwakye were to be the only British representatives in the 200 m. However, Turner went on to achieve the A standard for the 100 m, meaning that GBR were permitted another athlete in the event.