An hour of power. Although not as much as last time. I intended to take this one easy--I really meant to but these machines are insidious. Still, I kept it at around 21 SPM through 55 minutes. And the first 30 minutes did feel pretty easy. Then I let it rip, or at least as much as I can at the moment. Went under 1:55, and finished at 1:52 or 1:53s. 28 to 30 SPM.