>ME/CFS is defined by post-exertional malaise, so by definition it wouldn’t be improved by exertion. That's not quite true, because it isn't all exertion that

>ME/CFS is defined by post-exertional malaise, so by definition it wouldn’t be improved by exertion. That's not quite true, because it isn't all exertion that causes PEM. Generally it is only doing too much that triggers it.