"Activity tracker uses heart rate to personalize amount of exercise needed to prevent early death..."

“Activity tracker uses heart rate to personalize amount of exercise needed to prevent early death Activity tracker uses heart rate to personalize amount of exercise needed to prevent early death”

- https://www.sciencedaily.com/releases/2016/08/160827155832.htm

source http://physiquesportsuk.tumblr.com/post/149575602664