I have found this to be true too. It's a fine balance, but gentle stimulation (through walking, reading, writing, conversation, second language, etc) when feeling somewhat better, in very moderate doses (especially at first), interspersed with large doses of rest, seems to help. My brain seems to need both. The challenge is figuring out how not to overdo it so that you stay "sub-threshold" of symptoms as much as possible. As others have said, it's a marathon, not a sprint - take it real slow.