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?
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>now when I work out I burn way less calories because my body is getting used to the stress, I think.
Why do you think you’re burning less calories? It’s very likely that you’re not actually burning significantly less.
It’s very difficult to track calorie burn directly, so to answer your underlying question, we’d have to look at what you mean by “burning less calories”.
If you mean “the workout feels easier”, that doesn’t relate to calorie burn; that’s just your general fitness. As your heart, lungs, muscles and nerves get more used to the workouts, you’ll feel less fatigue even for the same (or more!) calories burned.
If you mean “the exercise bike shows a lower calorie burn”, I advise you to ignore that. Calorie tracking for exercise machines is notoriously inaccurate.
If you mean “I’ve lost weight so it takes fewer calories to move the body” – yes, a lighter body takes somewhat fewer calories to move; but it’s not a huge effect, and at the same time, muscle takes more calorie maintenance than fat. So it’s unlikely that you’d be seeing a big effect after 4 months.
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