Good for you!! I like it when I feel I have accomplished something new at the end of a ride. My husband and I did hills around our neighborhood today. He thought he was going to die--we only did 12 miles!!!!!!!!
I told him we are too used to a paved trail with modest inclines. Those are challenging too, but in a different way. We see how fast we can go or how far.
The hills today gave us motivation to continue expanding our fitness into other areas. I'm looking forward to seeing how this new "training" affects my ride on the paved trail.