HR on Charge 3 not accurate DURING TREADMILL EXERCISE APP

[MrMarv]

First off, I am a big supporter of the Fitbit devices and their firmware programmers - not as much of a cheerleader sometimes for their app and web development teams (probably Project Leaders and Quality Insurance or maybe the people that push them to market too soon), but I still respect them.

And for the most part, the Charge 3 has been holding its own in the bpm area - when it says 108 and I count 27 beats in 15 seconds I smile. And it rarely disappoints me.

Until I put it into exercise mode, that is.

And I have held off until the latest firmware update came through last night so I could run another short test.

Last night and tonight I performed two treadmill exercises, 14 and 7 minutes in length at 2.2 and 2.5 mph.

For the first exercise last night, I did my normal 50 squat reps and crunches and by the time I took a short break and hit the treadmill at 2.2 mph my HR was up to 100 and increased to 137 (low to mid peak) by the 5 minute mark. All expected; I'm not a youngster, after all. At 6:10 it was at 100 and ten seconds later, at 63 bpm!!! Huh? It started a little climb but by 8:30 it was at 61 bpm. This is for a 66 year old male with a pacemaker/defibrillator with a resting heart rate of 68 to 72. I ended the exercise after 14 minutes at a recorded 111 bpm.

And the chart of the activity definitely shows those three minutes as being under fat burn zone of over 77 bpm.

This evening I performed no pre-walk exercises, unless you count helping clean up after dinner, and started my session at 86 bpm. At 2:00 into the walk I was down to 74 and at 1:59 I was at 71. Up to 84 at 2:20 and back down to 66 at 2:35. From there on, with me increasing the pace to 2.5 mph at 4:00 and 3.0 man at 6:00, it quickly made its way back to fluctuating between 101 and 114, finishing at 104 bpm at 7:00. 

What the heck? There is no way I'm going to drop lower than 90 bpm in those scenarios. I didn't stop to take my pulse manually during those two abnormalities, but trust me, I will tomorrow.

Moderator edit: updated subject for clarity

Original poster edit - Moderator did not clarify, but rather muddied it up.

[Jay4321]

Hi, yes just use weights option, the other option is steps which i use when hiking up mountains. If you want to track your walk or run then use your phone gps. Tried it on my apple device, drew a map with distance.
Also keep checking your device HR against any gym equipment with HR sensors to test accuracy, if the device refuses to catchup with your actual HR, normally due to sweaty arms or loose strap, then remove device wipe off the sweat and strap it on again.
Hope this helps.



Sent from my Samsung Galaxy smartphone.