Kinch competed at the 1988 Olympic Games in Seoul as a member of the UK 4 x 100 metres relay quartet that reached the semi-finals. In 1990, she won a European Championship bronze medal in the relay along with her teammates Stephanie Douglas, Simmone Jacobs and Paula Thomas. That year also saw her run a lifetime best in the 100 m with 11.29 secs. She reached the quarter-finals of the 100 metres at the World Championships in both Tokyo, 1991 and Stuttgart, 1993.