It's way more complicated that that. The body is not a stupid mechanical device where you make a change in one place and then the rest of the system reacts in a

It's way more complicated that that. The body is not a stupid mechanical device where you make a change in one place and then the rest of the system reacts in a straightforward and predictable way. There is a brain in the middle of everything. And that brain affects motivation. Good luck doing something when you're not feeling motivated.