[Swizec]

When I use it for boxing, the calorie burn graph seems to very closely follow the heart rate graph. But only if the tracker was in exercise mode (longpress the button).

As for the article about inaccuracies. Their manual clearly states that during exercises that involve a lot of forearm flexing and vigorous arm movements the tracker will be inaccurate.

And I am sceptical that people wouldn't be able to tell from how they're feeling that they are at a dangerously high heart rate. But I guess it's possible.

The highest number my fitbit ever reported was about 170 (sprinting) so it's definitely cspable of measuring high heart rates.

[fefifofu]

I wonder why it's not recommended for cycling then. Cycling is my main exercise. Very little arm movement on a bike.

[rconti]

My old Fuelband used to register quite a bit of activity while cycling, surprisingly. It would register about half as many Nikefuel per hour as running, but still way way way way above, say, walking, let alone being seated.

I haven't cycled much since I got my fitbit charge hr.