Michael Schumacher is undergoing muscle treatment while in a medically induced coma to stop his muscles from seizing up.
The Formula One star has been in a coma for four weeks and reports in Germany say he began receiving the muscle treatment last week, says the Daily Express.
The 45-year-old remains sedated in intensive care following a ski accident in Grenoble.
An Austrian website reported that Schumacher could remain in a "persistent vegetative state" for the rest of his life.
Jean-Marc Orgogozo, Professor of Neurology at the University of Bordeaux, said: "Every day, every week in a coma the chances decline that the situation is improving."
But his family say: "We all know: he is a fighter and will not give up! We are deeply moved that there is no let up in the good wishes for Michael from around the world."
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