Exercise and good nutrition are becoming more and more important in medicine.
For the medical historian Wolfgang Eckart these are old ideas - it is new that so many people participate voluntarily.
But he considers the fixation of self-care to be a double-edged sword - because for some people the disease is a genetic fate.
Mr. Eckart, diet and exercise have been a big topic in medicine for several years.
Where does that come from all at once?