The furthest-forward position in the stroke: shins vertical, arms long, torso hinged forward, blade entering. The most powerful and the most vulnerable point of the cycle.
The catch decides two things: how much drive the stroke produces and whether your lower back survives the season. Hinge from the hips, not from the spine, and sit on your sit bones rather than rolling back onto the tailbone. A rounded back under load is the direct route to back pain — and under fatigue that is the first thing to collapse, even more so on the erg than in the boat. The second big error is opening the trunk while still at the catch: the handle gets pulled upward, the blade digs too deep, and the force curve grows a hump instead of one clean early peak. The sequence saves you: legs start the drive, the body opens only around 90 degrees of knee angle, arms come last. In trained rowers roughly 43 per cent of stroke force comes from the legs, 36 from the trunk and only 21 from the arms.