Heart rate adjusted by vibration
Has anyone experimented with adjusting the heart rate by vibrations? The idea would be to have a wearable device that vibrates at a consistent rate, and the hypothesis is that after a while your pulse would match the rate of the vibrations coming in. (Similarly to music increasing or decreasing your heart rate based on its tempo.) A practical use case I can imagine is lowering your heart rate for meditation or to help you go to sleep.