If you’re slammed today, skip the guilt, not the movement.
A 10-minute walk will boost your energy more than a nap you didn’t have time for.
Think of it as borrowing energy from future you —and future you is a generous dude.
(for the nerds... Newton's 1st law. Inertia is a wonderful thing if put to good use. Put yourself in motion and you will want to stay in motion.)