Jim Turk initially put his symptoms down to stress. The self-described “health nut” who was in training to run marathons suddenly found himself unable to jog for more than a couple of minutes before coming to a gasping, staggering halt. His speech began to slur. Turk, then in his early thirties, blamed the combined pressures of juggling a full-time job, studying for a masters degree and his parenting responsibilities. When he collapsed in the middle of a baseball field one sunny afternoon in 2008 while coaching his son?s team, he realised it was time to seek help.