My son is being treated for depression. Therapy plus medication. He says his depression is better. He will get sad sometimes but he rebounds well and quickly. When he started becoming depressed, one of his symptoms was lack of energy. Even though his depression is better, he still has no energy. It was take him all day to get one task done. Any thoughts on this. He recognizes that it should not take him all day to do one task but he is not sure why he has no energy.