The overall rowing experience encompasses pulley, seat, and — of course — resistance. Air and water have very distinct qualities, making them impossible to compare but interesting to contrast. Air stores inertia, which feeds into intense, constant effort during a goal-oriented workout. Water’s more sluggish drag makes for demanding exercise, but one that’s less consistent.

This type of machine provides a smooth action with little wear and tear to the mechanism, and the flywheel itself could help to keep you cool as you work out. It's worth noting that although water rowers aim for a realistic rowing feel, competitive rowers often use air rowers for land training. They tend to be less expensive than water-powered rowing machines, as well.
* While there is nothing to adjust from row to row on the WaterRower, it is possible to increase or decrease the level of resistance by changing how much water you put in the drum. The monitor is pre-calibrated to match 17 liters of water, but you can change that if you want. More than 17 liters = more resistance, up to the max fill line. This is not something you'll want to change frequently, it's more of a set-it-and-forget-it thing.
Using the same principles that govern the dynamics of a boat in water, the WaterRower S1 Stainless Steel Rower with S4 Monitor provides an unlimited range of resistance making it suitable for a variety of strength and skill levels. In a boat, the faster you move, the greater the drag and the greater the intensity of exercise required to maintain your speed. The limit to the speed you can maintain is you, your physiology, not the machine. For maximum realism and comfort, the WaterRower S1 Stainless Steel Rower's precision spragg clutch engages the instant the handle is pulled, so there is no jerkiness or jarring at the beginning of the stroke. The WaterRower S1 Stainless Steel Rower with S4 Monitor leaves you with the distinct sense that you are gliding effortlessly across the water. Order your WaterRower S1 Stainless Steel Rower from today!
The Challenge AR has the capability to allow the rower to control and adjust the resistance from “Feather light” to “Olympic sprint” delivering a silky smooth resistance to the user’s effort and instantaneous response to input with no “flat sport”.  With water resistance being the most accurate manner in which to simulate actual outdoor rowing, the Challenge AR provides a smooth and consistent sensation throughout the range of motion of the exercise experience.  
In sweep or sweep-oar rowing, each rower has one oar, held with both hands. This is generally done in pairs, fours, and eights. In some regions of the world, each rower in a sweep boat is referred to either as port or starboard, depending on which side of the boat the rower's oar extends to. In other regions, the port side is referred to as stroke side, and the starboard side as bow side; this applies even if the stroke oarsman is rowing on bow side and/or the bow oarsman on stroke side.