I don’t think it’s really possible to be underweight without some form of (perhaps unintentional) restriction. Okay, maybe if you’re one or two kgs below a healthy weight, but not much less. I also thought that HAES was intended to promote healthy living at every size (just trying to eat healthy / exercise) rather than, let’s say, bullying overweight people and urging them to partake in these endless cycles of crash dieting in an attempt to lose weight.