“People with stamina aren’t made any differently to anyone else,’ she was saying. ‘The only difference is they have a clear goal in mind, and a determination to get there. Stamina is essential to stay focused in a life filled with distraction. It is the ability to stick to a task when your body and mind are at their limit, the ability to keep your head down, swimming in your lane, without looking around, worrying who might overtake you”