I have a new "task master". The Mrs and I joined the local Y so we can start working out again. Our old Polar heart rate monitors were dead and needed new
batteries. Polar gets ~$50 to replace a single button battery in the chest strap which seems a little steep to me. I bought the Mrs a Garmin watch with heart rate and all that jazz a few years ago because she wanted one but I always relied on the Polar with the chest strap.
Mentioned this to my daughter and she volunteered my SILs "old" Fitbit Ionic. He's a died in the wool Apple fan and has the latest Apple watch as well as an iPhone 11 with everything in it. Anyhow, last weekend we were over at my daughters and when we left the Ionic came home with us.
Now, I'm a slave to the watch. The cotton pickin thing "reminds" me to move. "Reminds" me to walk more. The result is I'm paying a LOT more attention to my activity level and diet. The ^$%@ watch sort of makes me! I will say my resting heart rate has already dropped about 5BPM and, at my age, I'll take every beat I can lower it.
I have to admit that I was kind of doubtful about the accuracy of the heart rate monitor on a wrist watch, but, comparing it to a blood pressure cuff, it's almost spot on every morning. Technology has come a long way with this stuff.