Originally Posted by
WhyFi
If it's just a curiosity thing, check the rides of those that you follow on Strava. If they have power and have indicated an FTP, you'll see the Intensity. Looking at my last last 3+ hour ride, I landed at 79.
Note that only shows on paid users though (or at least on the mobile app, not sure if the website shows differently).
And often I also look at the power zones to see which zone they spend most of their time in.