I had fun today doing some single track including up and down hills, a mud hole, roots, branches, winding trail, rocks and meadows. It was a blast. An absolutely enjoyable outing. At 75yo, I did push the heart rate a bit (well, more than a bit) and I did rest a lot to get the HR back down. I guess a form of HIIT of my own devising??
I do all kinds - longer rides (at least for me), rides with the wife, trails, single track. No boredom for me, as everything changes all the time. I'll never know what I will see or who I will meet.
Great new flowers today, met some different folks - it's all good.