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HRM-Dual chest strap without the watch on (Vivoactive 4)

I realize I might be getting into edge cases here, but I wonder if anyone can give me a good answer here.

I have the HRM-Dual Chest strap and the Vivoactive 4s.

I am going to a hot sauna at least 4 times per week so I did not want to risk my watch getting damaged. Instead, I bought the chest strap and leave the watch right outside of the sauna. I tested it and it does show the readings live on the watch, but later when I look into the reports, there's a gap of about 20 minutes without any HR recordings.

is this normal, is there anything I can do to fix this?

0 ianmiles over 3 years ago

The trick is that an activity makes the watch keep connection to the canHRM.You Otherwise when the watch regrets to the time (watch face) screen if drops the external HRM connection.

Try this:

Start a non-GPS activity (eg Cardio) before going in
Stop activity when back out
No need to save activity of you don't want