Rowing is about length and leverage. That’s why elite rowers are tall as hell. The length you can maintain is crucial. The shorter you get the less efficient and less leverage you have. When people get tired they tend to drop their hands. Dropping your hands causes you to lose length and leverage and become weaker over time. Just keep your hands up and watch your calories up.
I see way too many people death grip the rowing handle. It doesn’t take a lot of grip to hold on to the thing. It’s not heavy. A nice light fingertip grip is all you need. The more you focus on hanging and the less on pulling the more efficient you’ll be. The limiting factor of 18.1 is gonna be your grip. There’s no sense taxing it on the lightest part of the whole workout. Bonus: you’ll get easy length if you keep the handle out in your fingers instead of death-gripped in your palms.
I said it before but a big piece of rowing is about length and leverage. The other part is breathing. Sitting up tall helps with both. Keeping your torso upright makes your trunk longer (better leverage) and doesn’t compress your lungs (better breathing). Telling you to, “Sit up” can be one of those constant reminders that is counterproductive. Here’s a simple hack, keep the monitor as tall as it’ll go. You’ll instinctively sit up taller to see it and get all the benefits without the work.