What is habit loop cue routine reward?

Example: You start running three mornings a week. The first few sessions are miserable — your lungs burn, your legs ache, and you have to force yourself out the door. But after each run, you feel a surge of energy and mood elevation that lasts hours. Within a month, something shifts. You wake up on a running day and your shoes are by the door before you've consciously decided anything. The discomfort cue has been overwritten by the reward anticipation. The habit is no longer something you do — it's something that does itself. The reward (energy, mood, identity as a runner) has reinforced the cue-routine connection so thoroughly that the loop runs without executive oversight. The feedback became self-sustaining.

This concept is part of Feedback Loops in the How to Think curriculum.