For some of the girls, it probably is the busy schedule that affects them, but I wouldn't doubt that there is pressure(From UFA, fans, media, etc) on the girls to stay thin. I remember sometime a few months back, there was discussion on 2ch(I think?) saying that Sayu was getting fat. There were some pics posted(I posted one of them in the countdown) showing that she was getting a little chubby. There were some others, but I didn't think it was a big deal at all. There are some girls that take a slight comment or even a playful joke about gaining weight to unhealthy extremes. Sayu hasn't gotten bad yet. As long as they're healthy, it doesn't matter what kind of body shape they have.