A sleep tracker is a device that monitors the duration and quality of your sleep. Many times, this technology is integrated into Fitbits or other fitness trackers, but not always—there are...

A Fitbit is a wearable device used to keep track your overall daily physical activity levels. The original Fitbits were fairly simple belt clips or wristbands that just counted your daily...

A heart rate monitor is a wearable device that measures how fast your heart is beating. These devices are great for monitoring your workout intensity, your recovery, and even the quality of your...