Today I present to you a guy who is no stranger to the BenGreenfieldFitness podcast: Tim Ferriss. Three years ago, Tim appeared on this show with Ray Cronise in the episode ". Two years ago, he returned with the ". And now Tim is back, because believe it or not, he knows how to do more than just freeze his balls off. As a matter of fact, the relentless self-experimenter, author and now TV star has just launched the highly entertaining , which you can . So far, I've watched the and the , and I've queued up the next. But Tim is also up to other things. Like eating copious amounts of cheese. And that's where we start in this discussion with Tim, in which you'll discover: -Why Tim is experimenting with ketosis... -How Tim recently put on 15 pounds of muscle...   -Why Tim isn't tracking variables like sleep or heart rate variability... -Which smart drugs Tim used to accelerate learning during the Tim Ferriss experiment... -Why Tim ensures there is some kind of potentially embarrassing outcome when he is learning something new... -Tim's biggest tip to learn to run up a wall Parkour style... -How to evade someone in an urban situation... -Why tactical shooting was one of Tim's favorite episodes... -How Tim is using cold thermogenesis... Resources from this episode: - (TV Show on iTunes) - (podcast) - (podcast) - (device) - (smart drug) - (drink) - (drink) - (video) - (urban escape and evasion course) Do you have questions, comments or feedback about the Tim Ferriss Experiment? Leave your thoughts at !