Active natures are rarely melancholy. Activity and melancholy are incompatible.

Movement and brooding are hard to do at once, and that is practical rather than moral. A mind left entirely still tends to circle, and circling lands on the worst available reading of things. Doing something with your hands or your legs interrupts the loop for a while. It settles nothing that is actually wrong, and it is no cure for the heavier kinds of low.

On a flat day, try the smallest task rather than waiting to feel like a large one. Making something or walking somewhere often shifts more than deciding does. If the weight stays whatever you do, that is worth telling someone rather than carrying alone.