Conditioned or potential heart problem?

Hello Drs,

A bit of background info
Age: 39
Weight: ~149-150lbs
Height: 166cm (5’5)

I’ve been training (resistance + cardio) for the past 3.5 years. The first 3 years being 3x/week barbell resistance training doing your templates (beginner, powerbuilding, strength I and powerlifting II) as well as ~60 min cardio/week.

The last 4 months or so I have slacked off significantly (due to work) where I only train 2x/week (weekends) and do 15-20 min cardio/week. My diet has also been trash (lots of sugary snacks like oreos and food like instant noodles) and I’ve gained ~2kg in this period.

That said, I recently had my first ever electrocardiogram (ECG) and the finding was sinus bradycardia. The recommendation was that I pursue further evaluation with a cardiac specialist for the aforementioned finding. Is this due to my training history or is this something that I should be worried about?

TIA!

Why was the ECG done in the first place?

Unfortunately this is likely beyond the scope of what we can reasonably answer here, especially without more background information and actually seeing your ECG.