That sounds ok depending on how fast you are going. If you are planning on putting a good amount of effort into it I think it will be too difficult. When I used to row for tempo I would go 10-12x150 meters Sub 30" R-1.
Just another idea.
Now on my only non-running day I drag the sled in the gym. 3 plates 30y Forward 30y Backwards x8 R-2ā. I think it not only has helped my recovery but has helped my strength endurance and maybe even strength. When doing my running workouts my legs feel better than they have previously and I seem to be recovering better as well. I have been doing this for 6 weeks and have slightly increased the weight on the sled but kept all other variables constant. Sorry not trying to jack the thread just figured Iād throw that option out there.