Robert and Trent discuss the role of the back and the trunk musculature in lifting weights and in developing a good physique. As Robert says to all his clients, "your back is never off the clock!" The back and trunk (or core as many people are fond of calling it nowadays) comprise a large part of the body's muscle mass, and are perhaps the most important and least understood of the body's levers.   Weights & Plates: https://weightsandplates.com Robert Santana on Instagram: @the_robert_santana   Trent Jones: @marmalade_cream https://www.marmaladecream.com