why i rarely or never see anyone in the gym with a notebook. Those big boy does not carried any workout log from obersavtion. Thank you

Does keeping a log necessary in weight training? I am just a beginner and does not have much luck in weight lifting in the past. I wonder if keeping a a log will produce result. I would appreciate if you share with me whether you need a log in weight training and how do you go about it? Do using pap...