Striking a balance between racing and life is important for sustaining success, but it's not easy to say what that looks like.
When Nico Rosberg announced his retirement just days after prevailing in an epic season-long Formula 1 world championship duel with Lewis Hamilton, it sent shockwaves throughout the motorsport establishment.
'How could a competitive sportsman at the peak of his powers suddenly go cold turkey?' they cried. 'Clearly he was never all that interested in the first place,' others complained.