Hi LHAAS8. I've had a fitbit for about three years and I currently weigh a similar amount to you. My fitbit calorie burn typcially ranges from about 1600 - 2200 calories. The higher being on very active days. My record step count has been 25,000 and my record floor count was 76. The "stairs" you mention are flights of stairs or an elevation gain from hills of at least 10 feet.
So over the past two days you have walked 25,000 steps each day and 80.5 floors each day? I suppose that is pretty close to my record. The 76 floors I had came from a five mile hike in the hills (I don't think my step count that day was 25,000 though). The day when I had 25,000 steps I did an hour long dance cardio workout, and spent the day siteseeing so I was walking around most of the day. I had fairly little sedentary time, but I don't think my calorie burn was that high. The fitbit calorie burn is mostly using your profile stats and how much and how fast you move throughout the day. In my case it often agrees with my heart rate monitor for step based aerobic exercise and my totals are in line with what other sites such as Spark would give me when factoring in my exercise. (My fitbit and heart rate monitor burns are nearly always lower than the Spark actiivty database so I am not logging over inflated numbers). So that makes me think....
I don't want to doubt your calorie burn... But I think if I had such unuusal numbers I would look closely at my profile settings and make sure they are all accurate (height weight, age, and gender). Then I would consider whether there may be any false activity picked up by the fitbit. The most common things I've heard of are from wearing it in a way it isn't calibrated for such as on a wristband. Also I think loose in a pocket can give strange readings. Then the other thing is whether you are picking up steps and floors in a car, motorcycle, golf cart, scooter or vibrating machinary. That is fairly common, depending where you wear the fitbit and how smooth or bumpy the ride is. There is a way to correct that if it is happening to you. Also, if you are manually logging any activity to your fitbit account, it might be good to look at that.
I would expect a relatively high calorie burn if you are truely acheiving 25,000 steps and 80 floors or hills a day. It is just it is probably about 12 -14 miles walked or ran? I know you mentioned 30 Day Shred, but that is only 20 minutes or so of activity--much of which the fitbit would not be counting (abs, pushups, weight exercises, etc). My guess is most of that activity was outside your workout. Do you have an active job? Were you running that day? Walking to work? It may be that you have been eating too little, but I guess I'd really look at everything before acting on it. Does your Spark range include all your exercise?
Those are just a few things to look at. As I said my fitbit range has always been similar to what I would see if I use one of those bmr/activity charts and look at what I would burn sedentary up to at their highest activity multiplier. But you are doing a little more activity than I have done on my best day.
Progress takes more than a week though. Is this level of activity normal for you? How long have you been this active?
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