Selfloops

The Garmin Vivosmart HR is a wrist activity tracker (non-watch) with optical HR capabilities watch has an optical HR Sensor.

As DCRainmaker puts it in his review.
The Vivosmart’s optical HR sensor serves roughly three purposes:

A) Ability to monitor HR 24×7 (including resting HR)
B) Ability to monitor HR during a workout (running primarily)
C) Ability to re-broadcast your HR over ANT+ to other ANT+ devices

Point C means  you can use it with our Group Fitness service since it can rebroadcast the HR signal.

From DCRainMaker:

To do this, on the Vivosmart HR you’ll have to dig into a bunch of menus.  It’s as if someone is making this complex on purpose.  You’ll press the button > Settings> Swipe 5 times to Heart Rate > Swipe to Broadcast Mode > Tap to Start Broadcasting.  Then see this:

 

With the Selfloops platform, we offer an easy way to keep track of your fitness and sport activities intensity level.

You can select, for example, the Selfloops Trends feature and visualize how your TRIMP changes over time. The TRIMP score measures your activity intensity taking into account the heart rate data and the time spent while exercising. This is an easy and immediate way to see how hard you have worked during the year.

In the picture below the bar chart shows your accumulated TRIMP score for each month, and the line chart shows the number of the activities performed in that month.

If you use a bike power meter, instead of the TRIMP score, you can use the Training Load, that measures the activity intensity using the bike power (Watts) and the time spent while riding.

Any way, Selfloops Trends allows you to easily keep track of your efforts at glance.

Nippo-Fantini pro cycling team will use Selfloops to track and analyze sport performance. We are proud to be contribute to their successes.

The latest Garmin FR235 watch has an optical HR Sensor. The nice thing about this watch is that you can use it with our Group Fitness service since it can rebroadcast the HR signal.

From the DCRainmaker blog post Garmin Forerunner 230 & 235 In-Depth Review:
“Lastly, the FR235 can have its HR signal ‘rebroadcasted’ to other ANT+ capable devices.  The unit rebroadcasts the HR over ANT+, identically to that of a heart rate strap. ”

To enable this, you’ll start from the main time page and press down till you see this HR page. Then, you’ll HOLD the up button down for a few seconds, which gives you this little nugget: