Christine Ohuruogo has revealed that she is hoping her performances can speak for themselves ahead of this summer's London Olympics.
The 400m runner has struggled for form since winning gold in Beijing four years ago but is determined to stay focused on retaining her title.
Ohuruogo said: "I'm really quiet and I prefer to be in the background and let my work speak for me.
"My coach [Lloyd Cowan] taught me that you have to do my job and run well, and that is all you need to get through.
"He told me that long before I won an Olympic gold medal. That's why it's so ingrained in me even to this day. Everything I do I do with that frame of mind, and that's why I have to say no to a lot of things."
Ohuruogo was part of the team that won the 4x400m relay at the World Indoor Championships in Istanbul.