There may be a clamour for him to join the growing list at the exit door after the World Cup, but Ireland captain Brian O'Driscoll is not yet ready to step off the international stage.

"People are very quick to write individuals off," O'Driscoll told the Irish Times.

"If you still feel fit and up to a certain standard that you have set yourself then why not play on?

"It is about either the body or the mind giving up. If both of them are working, as far as you are concerned, there is no reason to pay heed to what people are writing in their columns. The decision is left to you."

O'Driscoll's comments come in an interview with the Irish Times as he discusses his new role as chairman of the Irish Rugby Players Union.

Considering the post-World Cup calls within some sections of the media for him to step aside, the national captain was content to address the issue.

Turning 33 in January, he lists other world class operators like Brad Thorn, Simon Shaw and David Humphreys who continued playing into their late 30s.

"David Humphreys played until he was 36 and at a similar standard to where he was at in his early 20s. Part of it is about proving your critics wrong," O'Driscoll continued.

"That your time isn't up. When I was written off before I managed to do that and if I am written off again I will try my best to come back if I feel I still have it in me."

He was back training this week and is expected to return to action for Leinster against Munster in Dublin next Friday.

"Yeah, the fun and games begin again."