Positive reinforcement is essential to behavior change, whether you’re a dog owned by some guy named Pavlov, or you’re looking to exercise every day. Here’s a project from polinamilton for a band that provides sound when you start running. Here’s more from polinamilton via Istructables:
We drew inspiration from common hobbies like sports and music, which led us to create a product designed specifically for runners who struggle with motivation. As we all know, listening to music while running can be a great motivator. Our team’s shared experience of listening to music while running sparked the idea of a watch that controls music playback based on your movements. The watch responds to your runs, seamlessly blending sound to keep you moving.”
…
There is a single button on the bracelet. Pressing the button turns on Bluetooth, allowing you to connect it to a device of your choice, which in turn connects to your headphones. When you start running, the bracelet sends a signal to your phone and headphones after a successful connection, producing a sound. The sound stops automatically 15 seconds after you stop moving.