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Image Credit
/-/https/www.sciencebuddies.org/cdn/Files/13193/11/chest-strap-heart-rate-monitor.jpg)
Description:
A heart rate monitor with a chest strap next to a wristwatch
Source:
Wikimedia, user Bill Ebbesen
License:
Public Domain
Source URL:
https://commons.wikimedia.org/wiki/File:Polar_RS400_Heart_Rate_Monitor.jpg
/-/https/img.youtube.com/vi/ZOrGMru5JvE/0.jpg)
/-/https/img.youtube.com/vi/9G3TaquPqDE/0.jpg)
/-/https/img.youtube.com/vi/r3oIc2NHeSY/0.jpg)