Outside: How To Turn Dreadmill To Treadmill?

The Science Behind Your Favorite Workout Playlist 
Mollie Bloudoff-Indelicato/Outside, Jan 31, 2019

...For years, scientists have studied the link between music and heart rate. In 2005, a team of researchers found that listening to music with a fast tempo could speed up heart rates, while a leisurely tempo could slow them down. Furthermore, crescendos—where the volume of a song gradually rises—can increase heart rates, while decrescendos have the opposite effect, according to a small study from 2009 published in the journal Circulation. Although scientists aren’t certain why and how these interactions happen physiologically, relaxing music could be used to maintain a level of serenity for lower-intensity activities like yoga. “I always set my metronome at 60 [bpm] because it’s lower than the normal heart rate, and it helps me relax,” says Rodney Garnett, an ethnomusicologist at the University of Wyoming. “Something that has a slower beat gets a different response than something that has a fast beat..."

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