A:AnswerThe vivoactive can use either the built in optical heart rate or an external heart rate monitor. The HRM-Run will be compatible with this device.
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A:AnswerThank you for for your question. The Garmin HRM-Run part number: 010-10997-08 monitor does come with a chest strap.
More information on the HRM-Run is available within the manual which can be downloaded from the following link:
http://support.garmin.com/support/manuals/manuals.htm?partNo=010-10997-08&language=en&country=US
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