So, last night I set the world record for #RopeSmashChallenge Live on Periscope. Here's a tutorial on what's considered to be the cutting edge in fitness. I learned from Dr. David Jubb, he's a top scientist in the world right now, but the idea is that if you have an exercise that you can only do for 45 seconds, that's the best way to get strong because it optimizes your hormone release #SCIENCE