Insertion to Origin: Rep it out… Efficiently!
When you lift, to what are you paying the most attention? How much weight you can possibly get on the bar? How buff the gym lighting makes you look? Getting a good pump? The hottie a few benches over? Some of these each have their time and place, but to get the most out of every rep, those wanting to build muscle shouldn’t be focusing on moving the weight from A to B. Rather, from I to O ( insertion to origin ).