Federer, Ibrahimovic, Brady… What are these athletes doing to stay at the top level at age 39 and over?

At 39, the Swiss Roger Federer will make his comeback on the tennis courts, Monday, March 8, at the Doha tournament, after a year of absence. The opportunity to take stock of these athletes who have reached or exceeded this age, and who nevertheless continue to shine in their discipline. A non-exhaustive list but which makes it possible to understand why they are still at the top of the bill.