Slow heart rate

Hey everyone so as I exercise regularly last couple weeks, has helped my mental health a lot. And feel more happy and energy. But also in the evening (after one of my two spaced out prescribed Xanax doses) I notice my heart rate a bit slower like 55 beats per minute. I wonder if the combo of my heart gradually getting cardio fitter and the Xanax central nervous system effects are more visibly showing it’s effect to be able to sometimes slow heart rate. Does anyone else find their benzo medication reduces heart rate?

I’m on a very very very slow taper. Love and Blessings