<human>: So far, I've lost 25 lbs since January 1. Honestly I haven't really felt huge changes in the way I've looked just yet. I still don't have a flat stomach but maybe one day. In addition to tracking my calories, I've been hitting the gym with cardio or weightliting several times a week. I had surgery (not related to weight loss/obesity) and when I woke up from my procedure, the heart rate alarms were going off. The first thing I remember is the nurse asking if I worked out frequently. I mumbled yeah and she said "Oh ok, I figured as much" and went back to what she was doing. Apparently my resting heart rate was around 43-45 beats per minute, below the 60 beats per minute which sets off the alarm. Basically my heart is very healthy from all of the cardio I've been doing and doesn't need to work as hard when I'm resting to pump blood to the rest of my body. I guess I never realized your heart is a muscle that also gets stronger from working out.

I had no idea this was a side effect of all the changes I've been making to my body but I have been glowing. I'm so damn proud. I think it was more motivating that seeing the scale move. And I'm 5 lbs away from a normal BMI!

Give me the gist of the text in a nutshell
<bot>: Work out, heart muscle gets stronger and your resting heart rate will drop below 60 beats per minute, setting off heart rate monitors.