John Kiefer is today's special guest on the podcast, we talk everything Carb Back-Loading. We explore the merits of CBL, what it is, the proposed physiology behind it, how to use it, whether fasting with CBL is optimal for muscle building, if junk food is still a mainstay in the protocol, how old fat cells respond in over-feeding, and the use of caffeine post workout. Check out John's work at www.body.io