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1. A technology that will calculate and monitor your heart rate.​

Sagot :

Answer:

Most wearables with heart rate monitors today use a method called photoplethysmography (PPG) to measure heart rate. PPG is a technical term for shining light into the skin and measuring the amount of light that is scattered by blood flow.

Explanation:

sᴀɴᴀ ᴍᴀᴋᴀᴛᴜʟᴏɴɢ