bigb,
I've fallen out of shape a little because of my hammies but without much of a warmup today, I rowed 563 meters in two minutes. It didn't feel crazy hard so I recovered for about 6-7 minutes (light rowing, stretching) and then rowed another two minutes almost all out for 602 meters. I came through one minute around 292 meters (so the last minute was 310 meters) and had the intention of doing 3 minutes crazy hard but at the one minute mark, picked it up a bit and quit after two as I had almost nothing left in me. I think with a little more training, I could get up to 630 meters in two minutes.