Garmin's revamped Vivoactive HR fitness watch can now track your heart rate.

Garmin has been hard at work modifying its Vivoactive fitness watch, and aside from a much-needed slim down, the biggest difference is the two little letters at the end of its name.

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Unlike its hefty predecessor, Garmin Vivoactive HR comes with an onboard heart-rate tracker to keep tabs on your ticker 24/7 whether you’re working out or sleeping. It syncs with the Garmin Connect app on your phone for real-time ogling at your heart rate stats, and adds extra depth to other measurements like calories burned and exercise intensity.

For anyone already running around with Vivoactive on their wrist, the addition of a heart rate tracker is a real boon. Until now, the only way to throw heart metrics into the mix has been to climb into an HR-tracking chest strap, which isn’t always convenient or particularly comfortable.

As for the rest, Vivoactive HR is pretty much a dead-ringer for its older sibling. It’s got the same sunlight-friendly low-res colour touchscreen LCD, onboard GPS, and that week-long battery life we’re oh-so fond of. It can track sports like running, cycling, golf, and skiing, and it’s rugged and waterproof so it can join you to track laps in the pool.

Besides fitness tracking, Vivoactive HR will also guzzle up notifications from your phone in real time. There are tons of free watch face designs for customising its look, and you can dip into extra widgets and apps in the Connect IQ store.

Vivoactive HR will be available in the second quarter of 2016, and is priced at $250 (around £177).