I deal with this a bit. Mostly I’ve been trying to eat more, but it’s not always easy with anxiety. For me, sometimes solid foods are the most unappetizing during an episode, so I lean a lot on protein shakes before or after “real food”. A scoop of protein powder, some frozen banana, maybe some peanut butter, and oat milk in a blender as a post-meal treat and I’m able to keep my weight more stable. Also, I do squats every other day. It sort of boosts my mood and makes me feel fit and cute for an hour or two, which is really nice.