Every crew parent eventually asks the same question. My kid has the best erg score on the team. Why isn’t he in the first boat?
The answer is that an erg machine and a shell measure two different things, and the gap between them is where a lot of youth rowing confusion lives.
The erg is raw output. A rower pulls a chain, a flywheel spins against air resistance, and a sensor converts that into a number. Nothing about the machine cares whether the rower’s blade work matches seven other blades, whether the catch is early or late, or whether the boat sets flat in the water. The erg rewards pure engine. It’s honest, repeatable, and completely indifferent to anything happening around it.
A shell rewards something an erg can’t measure: synchronization. Eight rowers pulling with slightly mistimed catches move a boat slower than eight rowers pulling in exact unison at a lower average power, because every mistimed stroke fights the boat instead of moving it. A rower with a huge erg score and sloppy timing can be a net drag on boat speed. This is the single hardest thing for a strong-erg, weak-technique rower to accept, and it’s true anyway.
The correlation is real, just not exact. Sports scientists have built models converting 2K erg times into predicted boat speeds across boat classes, and in calm water with technically sound crews those predictions land close. Real conditions add noise. Wind, wake, a coxswain’s line, a slightly heavier rower sitting in a bad spot in the boat: all of it moves the actual result away from the machine’s prediction.
This is exactly why seat racing exists instead of just posting erg scores and calling it a lineup. A coach who only used erg rankings would build a boat full of powerful rowers who can’t move together, and lose to a program with slightly lower erg scores and cleaner synchronization. Good coaches know this. That’s why the erg score gets a rower into the conversation, and seat racing decides who’s actually in the boat.
What this means for a rower stuck below their erg ranking. Technique closes the gap faster than raw power does at this stage. A rower who spends winter erg season also drilling catch timing and blade depth in the tank or on stationary equipment often jumps more seats in spring than a rower who just chases a faster 2K number. Ask the coach specifically what’s costing seats: power or timing. They’re different problems with different fixes.
What this means for a rower whose erg score isn’t elite. Height, timing, and boat feel matter enough that a technically clean rower with a mid-pack erg score can out-row a raw-power rower who’s still learning to move a shell. The crew pathway by age covers how erg scores and real boat speed both develop over the high school years, and neither one is fixed at 15.
The erg machine will always tell the truth about how hard someone can pull. The boat tells the truth about whether that power actually moves anything.
Coaches who know the difference build faster boats. Parents who learn the difference stop arguing with a seat chart that was never wrong in the first place.