[4] At the 2001 IAAF/Westel World Youth Championships, Cuddihy qualified for the final of the 400 metres by finishing second in her heat with a time of 54.16, a season's best.

[1] On 12 June 2003, at a European GP meeting in Riga, Latvia, Cuddihy broke the junior Irish national record in the 400 metres with a time of 53.21 seconds.

At the 2003 World Championships in Athletics held in Paris, France, Cuddihy qualified for the final of the 400 metres with a time of 53.68 seconds.

[9] She participated in the 2004 Irish National Indoor Championships in Belfast, Northern Ireland, where she won the 400 metres in a new all-comers record of 53.50 seconds over Moushaumi Robinson.

[10] As a result of her win, she was automatically selected to be part of the Irish team for the 2004 IAAF World Indoor Championships held the following month.

[16] In the eighteen months prior to July 2006, Cuddihy suffered from glandular fever and underwent operations on the cartilage on both knees.

[20] Cuddihy was also a member of the Irish 4 x 100 metres relay team at the European Championships, alongside Derval O'Rourke, Ailis McSweeney, and Anna Boyle.

[24] In June, Cuddihy appeared at European Cup First League 'A' match, where she was part of the Irish 4 x 100 metres relay quartet that finished third.

[34] Following a hiatus, Cuddihy returned to athletics at the Melbourne Track Classic in March 2010, where she placed third in the 400 metres with a time of 52.95 seconds.

[37] She was also a member of the Irish 4 x 400 metres relay team alongside Marian Andrews, Brona Furlong, and Michelle Carey which failed to progress from the heats after finishing sixth.

[41] Cuddihy competed at the 2011 World Championships in Daegu, South Korea in the 400 metres after securing the B-standard qualifying time.

She, along with Marian Andrews-Heffernan, Claire Bergin, and Michelle Carey set a new Irish record of 3:27.48, but failed to qualify for the final after finishing fourth in their heat.