Oh yes, this happens to me often, especially since I suffer from depression that I don't take anything for. For myself, I just push myself to do something. Nothing strenuous, just maybe a walk with music. Once I get going, I find that it feels good and I keep going. It's the push to get started that I need to overcome. When I am really feeling insolent against moving (lol), I just push myself to get out of the apartment to do anything. Anything is always better than nothing, I think.