As a Harvard squash player, Will Ahmed discovered his game improved when he focused on things like sleep, diet, and time spent recovering from training. He was convinced that granular health and heart data would become invaluable to other athletes if it could be bundled into a wearable wrist strap. In 2012, Will founded WHOOP, and after three years the company launched its first model, with Lebron James and Michael Phelps as advocates. But WHOOP struggled to gain traction with mere mortals, and spent years overhauling its business model and fending off big name competitors. Eventually it became one of the most popular wearables on the market, with a valuation well above $3 billion.  This episode was researched and produced by Katherine Sypher and edited by Neva Grant, with music by Ramtin Arablouei. Our engineer was Patrick Murray. You can follow HIBT on X & Instagram, and email us at hibt@id.wondery.com. Sign up for Guy's free newsletter at guyraz.com and on Substack. Learn more about your ad choices. Visit podcastchoices.com/adchoices