Troubleshooting · Indoor rowing
Reading the monitor: what a bad rowing session is telling you
The rowing machine tells you more about what your body is doing than almost any other piece of gym equipment, and most people read only one number on it. Split, rate, ratio and the shape of the force curve each describe a different part of the stroke, and when a session goes badly they usually disagree with each other in a way that identifies the problem. This is how to read them together, and what the common patterns mean.
Split is the time to cover 500 m at the current power, and it is the only number that measures output. Everything else on the screen describes how that output is being produced.
Stroke rate is strokes per minute, and it is not a measure of effort. The same split can be produced at a low rate with strong strokes or a high rate with weak ones, and the second costs far more energy for the same result. A rate climbing while the split stays flat is the clearest sign of fatigue there is.
Ratio is the relationship between the drive — the part where you are pushing — and the recovery. Rowing well means a fast drive and a slow, controlled recovery, roughly one to two. Almost every beginner rushes the recovery, which produces a high rate, a poor split and exhaustion.
The force curve is the shape of the power you apply across a single drive. A good curve rises steeply, peaks early, and falls away smoothly. Its faults are visible as shapes and each shape has a name and a cause, which makes it the most diagnostic display on the machine and the one nobody looks at.
- Measures output
- Split only
- Measures effort
- Nothing on the screen does
- Most diagnostic display
- The force curve
- Commonest fault
- Rushing the recovery
- The split drifts slower while the rate climbs — Fatigue, and specifically leg fatigue. As the legs tire, the stroke shortens and the body compensates by rowing faster. Rate up and split down together is the signature. The fix inside a session is to lower the rate deliberately and lengthen, which usually recovers some of the split immediately.
- A high rate from the very start — The recovery is being rushed. Count it: the slide back to the catch should take about twice as long as the drive. Deliberately slowing the return typically drops the rate by four or five strokes a minute and improves the split at the same time, which is a surprising result the first time it happens.
- The force curve has a notch or dip near the start — The classic sequencing fault: the back opens before the legs have finished driving, so power is transferred between muscle groups and the curve records the handover. The stroke is legs, then body, then arms — in that order, overlapping smoothly.
- A low, flat, wide force curve — Not enough leg drive. Peak force is low and the drive is long and weak, usually from pulling with the arms and back rather than pushing with the legs. This is also the pattern that produces back soreness.
- A late peak in the force curve — The power is arriving at the end of the drive rather than at the catch, which typically means the catch is soft — the handle is being taken up gradually rather than the legs engaging against a loaded chain.
- Lower back sore after sessions — Almost always the sequencing above, plus reaching for extra length by rounding the back at the catch. Length comes from the legs and the hip hinge, not from curving the spine. If it persists, this is a matter for a physiotherapist rather than for a training plan.
- The split will not improve despite consistent training — Most often because almost all of the training is at the same moderate intensity — hard enough to be tiring and not hard enough to drive adaptation, and never easy enough to build a base. The distribution of intensity matters more than the total volume.
- The machine feels much harder than it did — Check the drag factor rather than the damper. Damper position is not a resistance setting; the drag factor is the number the machine actually uses and it changes as the flywheel gets dusty. A machine that has not been cleaned in a year can read very differently at the same damper.
The lever on the side of an air machine is not a difficulty setting. It changes how much air reaches the flywheel, which changes how quickly the flywheel decelerates between strokes — the feel of the stroke, not the resistance of it. A machine on the highest setting feels like rowing a heavy boat and a machine on the lowest feels like a light one, and it is entirely possible to work harder on the lowest setting than on the highest.
What matters is the drag factor, which the monitor can display and which is a real measurement rather than a lever position. The same drag factor is a different damper number on different machines and on the same machine in different conditions, which is why the lever is a poor thing to standardise on.
Setting it high in the belief that this is training harder is the most common misuse. It produces a slow, heavy stroke, it loads the back more, and it tends to reduce rather than increase the power an inexperienced rower can produce over any distance beyond a sprint.
Questions this guide answers
Listed so you can tell at a glance whether this is the page you wanted. HobbyHQ keeps one guide per question family rather than a page per phrasing.
- why does my split get slower during a session
- what stroke rate should I row at
- what does the force curve on a rowing machine mean
- why does my back hurt after rowing
- what damper setting should I use
- why is my rowing split not improving
- what is drive to recovery ratio in rowing
Part of Indoor rowing. Last reviewed 2026-08-20.