See if this sounds familiar: You pick up a full carton of milk, put it down, then pick up another carton that’s almost empty. Of course the empty one feels lighter, but it’s suddenly so light you accidentally almost launch it across the room. What’s going on?
You’re faking out your nervous system: When you pick up the heavy carton, you recruit the amount of muscle mass needed for the job—so when you suddenly pick up the lighter carton, you have more strength than you need to lift it. Believe it or not, this same principle can be used in the gym to drastically increase your strength. Here are three great ways to pull a fast one on yourself.