I’m not sure if physical energy is the right word for this but I just wanted to make a post about the different kinds of energy we use up every day that you don’t actually notice if you don’t have a chronic illness. Physical energy is the obvious stuff like exercise and going shopping, the surprise for me when I was first ill was how much energy is used when you don’t actually feel like you’re using any.
Cognitive energy can be used up in different ways, like different levels of activity use up different amount of physical energy. Smaller things can be having a conversation with someone or listening to a book, larger activities that are more obvious can be things like watching a new TV show or movie, having a conversation when there are a lot of people around with other conversations going on. It tends to be that the more focus you need for an activity the more cognitive energy you use.