Or you could just count your reps to get a general sense of whether or not you need to add weight. Then use the mirror to guide your progress. I'm all for tech, but we're getting to the point where we are demanding less and less from our own gray matter to do very simple things. Working out gives its own feedback. It's not a bad thing to also work out your brain. Memorizing weights/reps is fairly unchallenging.
6/11/14 at 6:17pm