Harvard Heart Letter
Fitness trackers: A path to a healthier heart?
New, improved devices and apps may better guide you to exercise at the right intensity to help your heart. Perhaps the best-known problem with fitness trackers is that people often retire them to a junk drawer after a few months, once the novelty of using them wears off. But thatís not the only shortcoming with these devices, which are typically worn around the wrist or clipped to clothing.