From a first supermarket job earning £4 an hour, to the owner of a success personal training business, Peter Maciver (aka PMAC) is the powerhouse behind the fitness transformations of high-profile stars including Marvin and Rochelle Humes and Reggie Yates. His older brother, Mark, who recalls working 19-hour days in a factory for just £27, runs SliderCuts, a booming barbershop in East London. He’s published a book, developed an impressive line of merchandise, and he’s worked with leading brands from Dior and Louis Vuitton to Facebook and Reebok.

A Creative HEAD podcast project in partnership with Treatwell