Rowing machine resistance types: air vs magnetic vs water

Air and water rowers get harder the harder you pull, magnetic rowers hold whatever level you dial in and run nearly silent, and hydraulic piston rowers are the smallest and cheapest but feel least like real rowing. Concept2 notes that on its air rower "the harder you pull, the more resistance you will feel," and WaterRower says the same logic applies to its water flywheel. The resistance type shapes how a rower feels under load, how loud it runs, and how well it scales as your fitness improves.

Air resistance: scales with every stroke

Air rowers use a flywheel with fan blades inside a vented cage. As you pull, the fan spins and displaces air, creating resistance. Pull harder, spin faster, get more resistance. The relationship is direct and immediate.

This self-regulating quality is why air rowers dominate commercial gyms and competitive programs. You do not set a resistance level; the machine simply responds to how hard you row. A long, powerful drive creates significantly more resistance than a short, casual stroke.

The damper lever on a Concept2 is often mistaken for a resistance dial. Concept2 says it changes how the stroke feels, like shifting gears on a bike, but does not directly set the resistance: your pull does.

The tradeoff is noise. The fan generates a whooshing sound that rises with intensity. In a dedicated home gym it is manageable, but in an apartment or shared living space it can be a real problem, particularly during high-intensity intervals.

The PM5 monitor on the Concept2 RowErg measures how fast the flywheel slows between strokes (the drag factor) and uses it to calculate your work, which keeps scores comparable from one machine to the next. That is why Concept2 is the presenting sponsor of the World Rowing Indoor Championships through 2028 and keeps a public records list for its RowErg.

Best for: serious training, interval work, anyone who wants performance data they can compare over time.

Magnetic resistance: quiet and consistent

Magnetic rowers use adjustable magnets near the flywheel to create drag without physical contact. Resistance is set via a dial, lever, or digital console rather than generated by your effort level.

The main advantage is near-silent operation. The magnets never touch the flywheel, so there is no friction, no fan, and no swooshing; what you hear is mostly the seat rolling on the rail. The MERACH Q1S, for example, pairs a quiet magnetic flywheel with 16 resistance levels. This makes magnetic rowers the practical choice for apartments, early-morning sessions when others are sleeping, or office wellness rooms.

The limitation is that resistance does not automatically increase when you pull harder. You row at the level you set. If you want more challenge you have to manually bump the setting. Some newer models use electromagnetic resistance and can simulate a progressive curve, but most consumer-grade magnetic rowers remain fixed at your chosen level.

For steady-state cardio, rehabilitation work, or anyone newer to rowing, this is rarely a problem. For athletes chasing peak power output or doing sprint work, the fixed ceiling per setting can feel limiting.

Best for: apartment dwellers, shared spaces, beginners, rehabilitation, low-impact steady-state cardio.

Water resistance: natural feel, premium experience

Water rowers spin a paddle wheel inside a tank of real water. When you pull, the paddles push through the water, and like air, the harder you pull, the more resistance you feel. The water level is not a difficulty dial. WaterRower says changing it does not change the intensity of your workout; more water simulates a heavier boat and crew, and less water a lighter one. Its standard fill is 17 liters, with 19 liters the maximum.

The feel is distinct. Water has mass and inertia, so the catch (the moment you begin the drive) feels smooth and loaded in a way that air cannot fully replicate. Many experienced rowers describe water rowers as the closest indoor equivalent to rowing on a lake.

The sound is also different: a rhythmic, liquid rushing rather than a mechanical fan whir. Some people find it calming. It is not silent, but it is less aggressive than air.

Water rowers tend to be heavier and more expensive than comparable air or magnetic options. The tank adds weight, and the aesthetic finishes (many, like the WaterRower Walnut, are made with hardwood) push the price up. They also need a little tank care: WaterRower recommends adding a purification tablet every 3 to 6 months (sooner if the rower sits in direct sun) to keep algae out.

Water resistance does not just approximate the feeling of rowing on water, it uses the same physics.

Best for: home gyms where aesthetics matter, experienced rowers who value feel, anyone willing to pay a premium for a smooth, natural stroke.

Hydraulic resistance: compact but limited

Hydraulic rowers use pistons filled with fluid on the handles or arms to create resistance. Adjusting a dial changes the flow of fluid through the piston.

They are the most compact and affordable resistance type, and they dominate the low-price end of the market. A folding hydraulic rower can fit in a closet. On two-piston models each arm works independently, which some people use for rehab or to even out a weaker side.

The limitations are real, though. Most hydraulic rowers use a rowing motion that is more like a push-pull than a true coordinated drive. The stroke mechanics differ enough that they do not build the same muscle memory or movement pattern as a chain-and-seat rower. The stroke is also less smooth than other types, and the pistons can get hot during long sessions, which can lead to leaks over time. Shorter sessions are kinder to the cylinders.

Best for: very small spaces, tight budgets, light occasional use only.

Where these numbers come from

Frequently asked questions

For specific picks across all four resistance types, see our guide to the best rowing machines. Browse all fitness guides or read how we research and rate gear.