I too like seeing my heart rate on Strava. At 72 years old I keep an eye on it while riding too.
When I see it getting too high I take a break and walk it for a while.
I know I’m slow and my energy level isn’t great, but I still enjoy being out there doing what I do.
I also have a medical condition I have to deal with that works against me.
My highest heart rate should be 150 bpm while exercising.
My average mph and top speeds are pathetic compared to most riders, but that’s all I got. Here’s some examples.
Trail ride, Banker Trail to Cherry Ridge. 3.7 miles
Heart rate average 145 high of 162 3.6mph average /11mph top speed
Clinton Road ride 19.3 miles
Speed average 9.2 mph fastest 23 mph
Heart Rate average 134 highest 165
My daily ride 5 mph average on some road, some trail,
with a heart rate of average of 132 and high of 166