Munir Nanji, Citigroup Inc.’s head of central Europe, says he spent more than a decade overeating, drinking too much and flying too often as an investment banker in Asia. Six years ago, around his 50th birthday, he took up running. Since then, he’s spent tens of thousands of dollars on what has become an obsession involving hundreds of personal training sessions, regular blood tests, countless massage treatments and up to three hours a day of training. The result: Nanji secured a place on the Czech ultramarathon team.
In his quest to improve as a runner, Nanji dropped $2,000 on a ...