There is a concept in rowing called ‘swing’. It describes a state where the crew becomes more than the sum of its parts. Their timing is together, their efforts are matched, and their technique is clean. The end result is that, while the boat may not be going at maximum speed, it is racing along seemingly out of all proportion to the perceived effort from the crew.
Last night I hit a similar state on my bike. It was rainy and dark, I couldn’t quite get comfortable on the seat, my feet were wet and cold, and I was getting splashed with mud. But I was cruising along, maybe at 90% of my normal speed but with what felt like only 50% of the work. It only lasted for 15 minutes, out of a 45 minute trip, but happiness is made of such moments.