I was in the gym tonight and noticed that hardly anyone uses a logbook to keep track of their workout. In fact, I don't think I saw a single person with a logbook. I've noticed this before. How is one to gauge his or her progress? Guess? I don't understand it. I believe having a logbook is a very important part of training. It tells you when you've hit a plateau on a particular exercise meaning it's time to move on. Exact weights you've used on previous workouts. How many reps were done, and if those reps were rest paused or straight sets or whatever. I also like throwing in notes on how I felt or how long the workout was. I mean the list goes on and on. I feel that when I use a logbook, that I must beat my previous best on a particular exercise or else I have failed. It gives you something to shoot for. A purpose if you will. I'd just like to know how everyone else thought about it.