Calories Burned-how determined?

As you get more fit what used to raise your heart rate doesn't do so any more. Therefore, it would seem logical to me that you aren't burning as many calories. Years ago I remember I started using an exercise video at home that left me gasping and really raised my heart rate. A few months later it didn't raise my heart rate at all so I needed to switch monitors.

I don't use the HR function on a HR monitor (I do use a couple of different HR monitors for different purposes). However, I use a Fitbit which tells me my total calories burned per day (I can also look at it per activity as well). I also input my calories eaten to come up with my calorie deficit. I weigh in weekly at WW and find that my weight loss is usually very close to what would have been predicted by my calorie deficit. Therefore, I conclude that for me that Fitbit is quite accurate in determining calories burned.
 
I have never paid any attention to calories, except as a rough gauge of my weekly activity level. A very clever doctor named Ralph Paffenbarger studied a group of Harvard alumni. Those who burned > 2500 kc/week lived longer. Calories were estimated by hours spent in various very roughly classified activities. I don't own a scale, or a monitor. I do have a concept2 ergometer that I have had and used about 2 years.

I am a naturally active person, if I never again recorded my workouts I would still weigh what I weighed 50 years ago, without very much obvious redistribution.


Ha
 
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Ha: I agree activity level is key. My motto in retirement is "Have fun and burn calories". Meaning, don't be afraid to have fun and keep active. I lost about 20 lbs shortly after retirement but have gained about 7-8 lbs back. Beer is a problem as I do enjoy a few on a hot day. Cheers
 
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