The fitness tracker can measure steps, distance, calories burned and sleep for up to 30 days.
The Polar Team Pro Shirt lets coaches monitor an athlete's recovery and performance throughout an entire season.
The Moov HR is a workout tracker that provides real-time coaching and feedback for high intensity interval training.
If you just want a basic fitness tracker for walking, the Mi Band 2 does the job fine, but you'll have to look towards more expensive trackers if you want more features.
The Fitbit Flex 2 doesn't have all of the bells and whistles of other trackers, but it's finally swim-proof, and it does the basics and it does them well.
If you don't need water resistance and GPS, the Fitbit Charge 2 is the best overall fitness tracker you can buy.
The MilestonePod is a good, cheap option for beginners to track pace, distance and other running metrics.
Misfit's tube-shaped Ray fitness tracker looks stylish and gets the job done, but it does too little for what it costs.
The company's latest fitness tracker includes an optical heart-rate sensor, GPS and smartphone alerts.
While ultimately a more stylish (but heart-rate free) version of the older Charge HR, the Fitbit Alta is a winning fitness tracker with solid style appeal.
Garmin's latest fitness tracker has long battery life, can be worn in the pool and features interchangeable bands.
The Hexoskin Smart can track daily activities and measure heart rate, breathing rate, and more. It's also compatible with a number of popular fitness apps and devices.
This gadget from Omron Healthcare is worn around your wrist, displays the time, tracks your steps -- and monitors your blood pressure, too.
Fitness band plus smart scale plus heart-rate chest strap equals an expensive package.
The next model of the wearable fitness tracker makes the same extraordinary claims about calorie tracking as the original, but now with a brand new design.
The Shine 2 is a decent fitness tracker that's waterproof and vibrates, dogged by a fatal flaw: it just won't stay on our wrist.
The Garmin Vivosmart HR does fitness and heart rate tracking just about as well as the Fitbit Charge HR while adding smartphone alerts, too, all in a compact package.
The Moov Now helps beginners interested in working out take a step in the right direction, but you'll need to keep your smartphone handy to use it and overcome some quirks.