Yes, good point - my subjective feeling of effort is often at odds with my measured performance with Strava. And agreed on your second point too, I bike becaus

Yes, good point - my subjective feeling of effort is often at odds with my measured performance with Strava. And agreed on your second point too, I bike because I enjoy biking and it makes me feel better both physically and mentally. That I get good exercise out of it is a secondary benefit.