There are dozens of fitness gadgets on the market that can measure movement, heart rate, elevation, and even body temperature. Here’s how to figure out which will work for you.
While no technology will ever replace diet and exercise, a new class of gadgets may provide key insights into your physical fitness. Known by a litany of terms—fitness trackers, health monitors, activity trackers, and wearables—there’s a growing cadre of tech toys that share a common goal: to get you into...