Originally Posted by
TrojanHorse
...Anyway, go find a big hill, put yourself in a reasonably tough gear and hammer up the hill. Stand as often as you can, and see what your HR tops out at. Make sure the hill takes you at least 5 min. to get up, preferably longer.
This.
A 60 RHR is decent. A 39 year-old person in good to slightly better-than-fair physical condition will be around 50 or so, plus or minus. Measure your RHR first thing in the morning, even before you get out of bed to answer the call of nature. That will tell you your real RHR. Do it a couple of days is a row. Even before you roll over. Try to stay as still as possible upon waking. Don't even prop yourself up to turn off the alarm. 60 is closer to "normal" for people in fair to good physical condition. (disclaimer: I am not a physician - this is just my personal observation about my own body.)
And as TrojanHorse says, to really get your heart rate up, your body has to work ... hard! Once you get a good sense of your max, you can set that within Strava to get more realistic zone classifications for your rides. It seems that most of my mileage is right around the cutoff between zone 3 and zone 4. Rarely do I get into zone 5, and then for only a few minutes. Maybe I'm not working hard enough? I also looked at my ride history to figure out what my max was ... then added 5 because I doubt I ever enter a fully anaerobic mode.