The wife of former president Nelson Mandela, Graca Machel, has dispelled rumours about the elderly statesman's health.

Machel told Eyewitness News on Thursday Madiba is doing well and finds renewed energy for each day.

"Madiba is doing very well. Madiba is aging but he is healthy. We are very lucky that during his life he has exercised so he banked energy and a capacity to keep himself strong," said Machel.