Marti reached her peak indoors in 1997, by clearing 1.95 m at the Birmingham indoor Grand Prix, to add one centimetre to the UK indoor record that she held jointly with Diana Davies and Jo Jennings. This height was also equal to the UK outdoor record. The record stood for 17 years, until Katarina Johnson-Thompson cleared 1.96 m on 8 February 2014. Also that year she reached the World Indoor Championship final in Paris and competed at the World Championships in Athens.