Are coaches today’s ‘snake oil’ merchants? Coaching continues to operate on limited evidence, but it’s time this changed, argue Andrew J T George and Jonathan Passmore

  The middle of the 19th century many people made their fortunes on patent medicines, often called ‘snake oil’, that were marketed as a panacea for all ills. These had various formulations. One contained mineral oil, callow, turpentine, pepper and camphor, while some contained cocaine,...