If you enjoy hearing about the link between human evolution and exercise, I recommend you check out my first conversation with Dr Daniel E. Lieberman, which you can find here: https://www.youtube.com/watch?v=ujRwf1HdNjk Follow David: Twitter - https://bit.ly/483oZIF My new book! 'The 33 Laws Of Business & Life' is out now - https://smarturl.it/DOACbook Follow me: https://beacons.ai/diaryofaceo Sponsors: Huel: https://g2ul0.app.link/G4RjcdKNKsb ZOE: http://joinzoe.com with an exclusive code CEO10 for 10% off