Fitbit vs Fitbit ChargeHR
Nayners21
Posts: 76 Member
For anyone who has the new ChargeHR already... if you previously owned another fitbit device, have you noticed that your TOTAL CALORIES BURNED are similar using the ChargeHR? Just curious to know if my fitbit flex is accurate on my TDEE.
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I'll mention what I've been reading on the Fitbit forums.
Yes on non-exercise days, because they use the same formula. Some with Zip have noticed lowered TDEE, likely because most with Zip see more steps than other devices.
When the activity is started for a workout and the HRM is used, comments seem to be all over the place, some comparing to using another HRM and getting equal results, some comparing to prior Fitbit estimate wondering why it's higher now (of course it'll be higher for non-step based workouts based on HR now, those folks never understood how it worked), some comparing to database entries, but they are incorrectly using HRM for lifting.
So you'd likely have the same non-exercise TDEE estimated, exercise could be different.0 -
It's only my first "normal" day with the Charge HR but it seems to be giving me more steps than my Flex did (both set to Dominant hand). Not sure if that means it's over-counting or if the Flex was under.
I figure I'll use it as an impetus to be hyper-vigilant about logging/calorie counting for the next 4 weeks and assess once I have a decent amount of data to work with. If I don't lose the expected weight, it's probably granting me too much I'll adjust my calorie budget downward by whatever the overage is and check again in another month. Science!
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I'll mention what I've been reading on the Fitbit forums.
Yes on non-exercise days, because they use the same formula. Some with Zip have noticed lowered TDEE, likely because most with Zip see more steps than other devices.
When the activity is started for a workout and the HRM is used, comments seem to be all over the place, some comparing to using another HRM and getting equal results, some comparing to prior Fitbit estimate wondering why it's higher now (of course it'll be higher for non-step based workouts based on HR now, those folks never understood how it worked), some comparing to database entries, but they are incorrectly using HRM for lifting.
So you'd likely have the same non-exercise TDEE estimated, exercise could be different.
I'm so confused about how to log in my workouts of weight lifting days. I know I could easily burn anywhere from 400-700 calories with the workouts I do, its just not step based. That's why I am curious with the HRM if my TDEE would be higher.0 -
I'm so confused about how to log in my workouts of weight lifting days. I know I could easily burn anywhere from 400-700 calories with the workouts I do, its just not step based. That's why I am curious with the HRM if my TDEE would be higher.
The correlation between HR and calorie burn is only valid for aerobic steady-state cardio, not below exercise, and not anaerobic or non-steady-state.
Lifting if done right is anaerobic and non-steady state - therefore invalid calorie burns from a HRM formula.
Yes your TDEE is most certainly higher than what Fitbit is giving credit based on steps, because that's obviously not right either. I can do 15 squats and get no steps in 1 minute - I obviously burned more than BMR during that minute that Fitbit is giving me credit for.
2 sets x 5 lifts is minimum 10 minutes of badly underestimated BMR level burn, including the standing to recover with no steps, and that's underestimated too.
That's why you manually log it, even with the Charge HR. Because avg HR for a session is usually rather low if in shape, or high if not.
As to how you log it, what types of lifting? - 400-700 is rather high too.
Fitbit's Weight lifting entry is based on sets and rests of 1-3 minutes, as hard as you can lift reps 5-15, no maintenance easy lifting.
Circuit training would be the one for less than 60 sec rest, reps 15-20.
Calisthenics is the over 20 reps, barely any rest, hence the reason it's usually body weight only.
Just log it. Start the time with first lift though, not warmup walking, until the last lift is done and recovered as if you were going to do another lift. But not cooldown cardio.0 -
I'm so confused about how to log in my workouts of weight lifting days. I know I could easily burn anywhere from 400-700 calories with the workouts I do, its just not step based. That's why I am curious with the HRM if my TDEE would be higher.
Weight lifting does not burn 700 calories, nor do heart-rate monitors track lifting. HRMs are only for steady-state cardio, like running or biking.
You're correct about activity trackers not tracking lifting. All non-step exercise (including lifting, swimming & biking) must be logged either in Fitbit or in MFP—never both.0
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