Music has always been a powerful tool for capturing and sustaining attention, but the reason why has been unclear. An analysis of musical information clarifies the use of tempo as a movement cue. The tool you need is a metronome, which can be downloaded to most smart phones.
To start, take your pulse and set the metronome to match your heart rate. Tap your hand on your knee in rhythm with the beat. Increase and decrease the speed and tap your hand at the various speeds so that you can experience what a change in tempo feels like to you.