Humans have a tendency to walk to any rhythm that they listen to. It’s usually between 100 to 128 beats per minute. This is an interesting theory, but you can actually make people subconsciously walk faster by playing faster music! The Tempo concept earphones work on that principle. Instead of selecting the music, you select a BPM value. The earphones then choose the music for you, so you end up jogging or running at a predetermined pace!