My guest today is David Bishop, PhD from Victoria University in Australia. He's a world leading expert on the health and performance outcomes of exercise prescription with a particular emphasis on mitochondrial adaptations. Recently, he's been studying the impact of twice-per-day training and that's the main reason I brought him on the show. You'll learn, for example, that running twice in a day may be more beneficial than training for the same duration in one long run. But we explore many other topics that will help you take your workouts to the next level. I spoke with him in the midst of the 2020 COVID-19 pandemic while he was on sabbatical and in lockdown in the north of Italy.