I'm destroyed too. 4 hours today on the cross bike at mostly recovery pace, but with a
murderous 30 minute super-steep dirt climb in the middle. The climb has pitches of 25%, on dirt that's really pushing the edge of being rideable at all. The bike is 1x with a low gear of 40x32 which is too much gear for this climb. Probably about 10 minutes at max torque 30-40 rpm which is the type of effort that just kills me, grinding it out and gasping and trying so hard not to let the rear wheel break loose. I could go to bed right now.