For the past six months, Naomi Roba has spent up to four hours a day training at a running camp in Iten, Kenya. She’s shaved 23 minutes off her personal best for the half marathon — down to 1 hour 22 minutes. Another 10 minutes and she expects potential sponsors to come knocking.

In between this schedule, she fits in freelancing for large companies on corporate finance work. The contrast between this and her time as an M&A analyst at Goldman Sachs in London, which she left in February, is like “night and day”.