Monday, April 20, 2026

Calorie burn with lower heart rate due to new meds question

Hey all!

First time posting here but a bit about my journey before I get to my question

I am 5’9” F and I started at 345 lbs back in September of 2024 and am down to 205 lb as of this week. Goal is 170 lbs. I’ve achieved this through a mix of calorie counting and exercise.

I have had a heart condition most of my life and it has actually gotten worse with weight loss. I ignored it for YEARS before but it’s become harder to ignore in the last year. The doctors assume it’s from the increase in activity and I’m now on a non-selective beta blocker that slows my heart rate significantly to help with the heart condition (SVT).

Part of the way I’ve been able to stay consistent is gamifying my workout. I *need* to hit 300 calories burned per my Apple Watch before I can leave. Yes, I know this is arbitrary and I know that the count isn’t actually accurate. But my brain works well with the arbitrary number and consistency. (Before anyone asks, yes, high functioning autism is a factor here).

On to my question:

With the new medication, I’ve noticed that it takes me longer to hit that 300 goal due to the reduction in my heart rate. This would previously take me about 40-45 min, while now takes me 60-65 min, adding 20 min to my workout.

Am I ACTUALLY burning less in that same original 40-45 min time frame or is this just the watch basing the calories it assumes are burned off of my heart rate entirely?

submitted by /u/sirithaeariel
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