This week we chat with Jason Kelly, New York bureau chief, Bloomberg. Jason has been with Bloomberg since 2002. He is the author of Sweat Equity (2016) and The New Tycoons (2012).

The Lead Left: Jason, your new book, Sweat Equity, focuses on endurance sports and the fitness industry from the entrepreneur’s perspective. What was the inspiration for this project?

Jason Kelly: It was both personal and professional. I’ve been running marathons since 1999, I started looking at how dollars were being spent. Running is simple, not a complicated sport. You basically have shoes and clothes. I realized I was spending a lot on not just those basic items, but also the cost of races, your travel, your food, and so on. And I was spending a lot!