Carragher takes up boxing to keep hold of Liverpool place
"I know it sounds stupid to some people but I never feel like I have cemented my place, that it can all be taken away from me very quickly," Carragher told liverpoolfc.tv.
"I always try to do something different each summer to try to get that extra couple of per cent. I went boxing, I've always eaten well and now I eat to the absolute maximum.
"We are all getting older, but another way of looking at it is Daniel Agger and Martin Skrtel are getting more experienced which is going to help them.
"They are coming into the prime of their careers. I am not stupid. I am 32 in January. It will happen one day."