WiredReview: Jawbone Up3WiredAnd it's a new focus for a lot of fitness trackers, from the Fitbit Charge HR to the Microsoft Band to even the Apple Watch. Your resting heart rate is a particularly useful number—it's the point where your heart pumps the least blood, usually right ...REVIEW: Jawbone UP3 - Survival of the not-so-fitBusiness Spectatortất cả 2 bài viết »