I’ve been working out for about 4 months now (HIIT on a spin bike and a bit of weightlifting ~20 mins.) three times a week. I’m seeing good improvement in health and physique despite having no idea what I’m doing.
My motivator was calories, but now when I work out I burn way less calories because my body is getting used to the stress, I think. What’s happening? Is my workout less useful than before? Can I not eat as much or is my body burning more fuel now?
In: 54
As some others already replied, your fitbit just makes and estimate based on some measured parameters, mainly heart rate, movement registered through its accelerometers and your body measurements, that you had to input into the device initially. You mention you lost ~20 pounds of weight. Have you updated this in the fitbit? Unless you have smart scale connected to the app, it doesn’t know that. As you get fitter, you probably have generally lower heart rate during the day and your workouts. So your device goes OK, this person has lower heart rate, means lower activity = less calories burned. Probably most reliable way to track is to measure all you eat and compare to your weight (maintaining, loosing, gaining) and calculating from there. But even that is just an estimate, you would use some metabolic rate equation that is based on average over many people.
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