BTW, this is a very rough generalization, but for me, each step in the 10MPS from 26-32 spm requires about 10 Newtons more peak force.
1:55 @ 26 spm (70 Newtons, 8.8 SPI)
1:51 @ 27 spm (80 Newtons, 9.5 SPI)
1:47 @ 28 spm (90 Newtons, 10.2 SPI)
1:43 @ 29 spm (100 Newtons, 11 SPI)
1:40 @ 30 spm (110 Newtons, 11.7 SPI)
1:37 @ 31 spm (120 Newtons, 12.4 SPI)
1:34 @ 32 spm (130 Newtons, 13 SPI)
That's why foundational rowing is so important.
You need to develop enough peak force in your stroke in order to move up the 10 MPS ladder when you do distance rowing.
Back in 2003, I neglected my legs.
Because of this, I only pulled about 90 Newtons of peak force, even at full slide.
I now use my legs properly, so at full slide, I can now pull 130 Newtons of peak force.
If you only pull with 90 Newtons of peak force, your stroke tops out at 10.2 SPI and you start to trade rate for pace too early.
You don't row well.
Rich Cureton M 72 5'11" 165 lbs. 2K pbs: 6:27.5 (hwt), 6:28 (lwt)