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Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
I also think it would pair better if I'd been using a Garmin smartwatch, which I do not own, so that's something to consider if you're interested in the Garmin HRM-Pro.
Source: https://www.cnet.com/health/fitness/best-chest-strap-heart-rate-monitors/