@smilie It really becomes a mind battle, doesn't it? Part says move, get out and enjoy, while the other part wants you to bow to sitting and stagnating. Don't give in to that. I've been there, too. It becomes a habit, then a way of life. It is simply not good for you mentally/emotionally/physically. Fight mightily to overcome that depression and anxiety. Take those steps, talk to a trusted person.
Ginger