TV presenter Charlie Webster has been able to speak to her family after being brought out of her medically-induced coma earlier on Thursday, her manager said.
The 33-year-old Team GB ambassador remains in intensive care in a hospital in Rio de Janeiro after contracting a rare strain of malaria during a 3,000-mile (4,828km) charity cycle ride to the Brazilian city.
She is being kept on dialysis as her kidneys are not responding to treatment and is being supported by a respirator, but doctors said they are "very happy with Charlie's neurological results" after performing a number of cognitive tests.
Her mother said in a statement that she had been able to speak to her family.
She said: "Charlotte knows she nearly died. She mouthed to me earlier, 'look at all the machines keeping me alive'.
"Charlotte is really strong but as the doctors keep reminding me, everyone heals differently. I am just so thankful that she's able to communicate with us again.
"It's been the worst imaginable time - we have been beside ourselves with worry but the fact Charlotte is now conscious is amazing.
"Knowing Charlotte, the thing she'll be most annoyed about is that she's missed the Olympics."