Advice and answers from the Swimmo Team

There could be a few reasons why heart rate information is not displaying properly. Typically, this will be because the water is impacting the pulse measurement due to one of the following:

Chlorine and sea water can interfere with the device as they’re both highly conductive

Muscle strains or dynamic movement can result in the device moving from the required positioning

The strength of the signal your body sends varies greatly from person to person and depends on tissue composition.

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