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> A good quality fitness tracker with a built-in heart rate monitor like a Garmin Forerunner will give you a reasonably accurate estimate of calories out.

These aren't accurate at all. How would they be? All they have to work with is height, weight, and BPM.

https://www.reuters.com/article/us-health-fitness-tracker-ac...

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That's why I specified a good quality fitness tracker like a Garmin Forerunner. If you use something cheap like a Fitbit then of course it won't be accurate.

Got a cite for Garmin having more accurate HR than Fitbit? All I could find was someone on Garmin forums opining that cheap Fitbit did better - https://forums.garmin.com/forum/on-the-trail/wrist-worn/feni...

Disclosure: I work for Fitbit, but don't speak for Fitbit.

I concede that Garmin integrates with chest straps that are more accurate, but who's going to wear one of those for around-the-clock calorie counting?

I still don't see how it can be accurate for tracking calories.

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