I gained another 0.4 lbs this week. I gained exactly the same the week before. It's expected and surprising at the same time. Expected because I've fallen away from meal tracking for a while, and have eaten more and some not so diet perfect stuff. Surprising because I continue to feel and look thinner. The latter could be a cognitive distortion. Unlike many, I have a tendency to think myself thinner/lighter than I really am. That can be slightly dangerous. Or, maybe I have gained some muscle mass. I feel stronger and more muscular. I have always had the basis (for lack of better word) of good muscle mass all the way from my ballet days. Ballet muscle is lean and long looking, not bulky.