The British gold medal hope insisted she will run providing she avoids a setback in her recovery from her thigh injury.
"I'm racing unless my leg breaks down," said Radcliffe, 34, who had looked destined to miss out on her fourth consecutive Olympics when an MRI scan in May revealed a stress fracture in her left femur.
The marathon world record holder has defied medical opinion so far and linked up with the British squad at their Macau training base today.
Radcliffe will now begin the last few steps towards realising her ambition of an Olympic gold, her main remaining goal in a highly successful career.
Earlier, British Athletics Performance Director Dave Collins said Radcliffe would be given every chance to complete. He said: "I am more optimistic as time goes on.
"We'll have a look. We've given her the space and the time that I think her performance level deserves, we'll see her get here and again, we'll be watching progress and see what happens. That's what we've been doing all the way through."
Collins stressed the final say on Radcliffe's fitness would come down to a joint decision, although he refused to be drawn on what would happen if the lure of the Olympics proved too strong and she defied medical advice to compete.
