Although the oar can be conveniently thought of as a lever with a "fixed" pivot point in the water, the blade moves sideways and sternwards through the water, so that the magnitude of the propulsion force developed is the result of a complex interaction between unsteady fluid mechanics (the water flow around the blade) and solid mechanics and dynamics (the handle force applied to the oar, the oar's inertia and bending characteristic, the acceleration of the boat and so on).
If you're looking at a WaterRower, you're probably also considering the Concept2. They're both great machines, but which you choose depends on your needs. I think the WaterRower is ideal for most people, but not everyone. The WaterRower has a number of advantages vs the Concept 2 - it is quieter, the mechanism up front is lower profile, it has a comfortable seat, it is much better looking, it's easier to stand up when you're not rowing and it's just ... zen-like. There is something about the smoothness of the WaterRower that makes it a joy to use, and because it's quiet you can easily stream your favorite binge-series without cranking the volume too high.

The Water Rower comes partly preassembled in two large boxes. The assembly instructions are reasonably good, and as long as you take your time and follow them carefully (read all the text) it takes about 45 minutes from opening the first box to trying it out. I bought bottles of distilled water to fill it, which made it easy to fill using the included funnel & hose.

Of the four types of rowing machines or ergometers, water rowers are best at reproducing the sensation of on-water rowing. Their stroke cycles hold true to the dynamics of real paddling, and each stroke is punctuated with a splash! Water rowers have sliding seats to allow full-body cardiovascular workouts. (With cheaper rowing machines, in contrast, the seats don’t move.) These fitness machines tend to feature high quality parts and can last a lifetime.
The WaterRower Oxbridge is hand crafted in solid Cherrywood. Like all woods, Cherrywood may vary in color from a red-brown to deep... red. The wood will darken in color with exposure to light. For this reason all WaterRower Cherrywood components are kept in light free rooms to protect from shadowing. A new WaterRower Oxbridge will therefore appear quite light in color. The wood will however darken over time reaching a rich reddish hue.Handcrafted rowing machine with inchwater flywheel inch that replicates actual rowing feelFlywheel sits in enclosed water tank to provide smooth, quiet, self-regulated resistanceSeries 4 performance monitor tracks workout intensity, stroke rate, heart rate, and moreStores upright; measures 84 x 21 x 22 inches (W x H x D) and weighs 117 poundsStores upright; measures 84 x 21 x 22 inches (W x H x D) and weighs 117 pounds read more
The oldest, and arguably most famous, head race is the Head of the River Race, founded by Steve Fairbairn in 1926 which takes place each March on the river Thames in London, United Kingdom. Head racing was exported to the United States in the 1950s, and the Head of the Charles Regatta held each October on the Charles River in Boston, Massachusetts, United States is now the largest rowing event in the world. The Head of the Charles, along with the Head of the Schuylkill in Philadelphia and the Head of the Connecticut, are considered to be the three “fall classics.”[40]
With magnetic rowing machines, adjusting the resistance means varying the distance between a flywheel and one or more strong magnets. This is done either manually, using mechanical sliders, or digitally by the console controls. Like hydraulic rowers, magnetic rowing machines operate quietly and have a compact design for easy storage. Unlike hydraulic rowers, they can provide a smooth and consistent workout. It's a very different kind of feel to what you'd expect from an air or water rower, though. You still get a good workout, but it doesn't simulate the sensation of rowing in quite the same way.
The standard length races for the Olympics and the World Rowing Championships is 2 kilometres (1.24 mi) long; 1.5 kilometres (0.93 mi) - 2 kilometres (1.24 mi) for US high school races on the east coast; and 1,000 m for masters rowers (rowers older than 27). However the race distance can and does vary from dashes or sprints, which may be 500 metres (1,640 ft) long, to races of marathon or ultra-marathon length races such as the Tour du Léman in Geneva, Switzerland which is 160 kilometres (99 mi),[36] and the 2 day, 185-kilometre (115 mi) Corvallis to Portland Regatta[37] held in Oregon, USA. In the UK, regattas are generally between 500 metres (1,640 ft) and 2 kilometres (1.24 mi) long.
Fetch is the distance over which the wind interacts with the water surface to creates waves. The longer the fetch the bigger (higher) the waves are. If the shore (green in the diagram) is a hill, there will be a wind shadow which gives protection from the wind, but even if the shore is flat as a pancake and gives no protection, the waves become progressively smaller as you for upwind to the shore. Thus, rowing upwind toward shore is always an escape from waves.

I don't know how this machine compares to others. I have no idea. Here's what I know: I've had treadmills and elliptical machines, weight benches and several exercise appliances from infomercials. They all work exactly like they should if you use the equipment on a consistent basis. That's where the problem comes in. I would always give up eventually and the machine would sit in the corner, covered with my laundry, laughing at me. I bought this rower without ever even trying one at the gym because I was desperate to do something (and I voted for Frank Underwood). This was the one machine I was not only able to stick with, but I now eagerly look forward to using. It started a chain reaction that changed everything. You know those incredible before/after transformation pictures you see on weight loss shows? I'm one of those guys now. Rowing is like a 'secret' in the fitness world in the way there is so little emphasis. However, in terms of results, it is so much more efficient. It works your upper and lower body at the same time, huge cardio/fat burner and builds muscle like crazy. I'm glad I'm in on the secret too.
I have also received negative feedback about the resistance. After 15 minutes at the maximum level, you will feel that you are hardly putting an effort to row. However, this won’t be an issue if your weight is less. This could indicate an issue with the oil or gasoline mixture in the piston. Also, issues were mentioned by other customers with the footrests. They’d problem strapping their feet. It is a bigger issue as it becomes difficult for people who have small feet as the feet keeps on slipping. The footrest grip is not tight. This is affecting particularly when you would like to experience a workout without any interruption; when you actually want to go with the flow of workout. Fast rowing also becomes difficult with this type of problem as you have to stop and strap the feet back. However, the problem could be solved by using a wide and thick Velcro straps. Use your creativity and be resourceful while coming up with the ideas to solve the problem of slipping feet.
Not a lot to complain about on the Classic rower, but when searching for drawbacks of this rowing machine, the S4 Monitor is the one thing that occasionally comes up.  It’s rather basic and it isn’t backlit. Regardless, the monitor has all necessary tracking and features for getting an excellent workout, and in normal lighting there is no problem reading the display.
The Water Rower comes partly preassembled in two large boxes. The assembly instructions are reasonably good, and as long as you take your time and follow them carefully (read all the text) it takes about 45 minutes from opening the first box to trying it out. I bought bottles of distilled water to fill it, which made it easy to fill using the included funnel & hose.
The WaterRower Classic Rower is unsurpassed in terms of design refinement. WaterRower Classic Rower has a patented WaterFlywheel design emulates rowing like no machine before it. Smooth, silent and storing conveniently upright the WaterRower Classic Rower is perfect for any user and in any environment. The WaterRower Classic Rower has an unique patented WaterFlywheel has been designed to emulate the dynamics of a boat moving through water.
Wave water resistance feels and sounds like rowing on the water. Water resistance provides a dynamic rowing stroke with infinite resistance levels. Siphon included for filling and removing water from reservoir. Wide, molded seat for comfort. Ball-bearing rollers for smooth seat gliding. Multi-function monitor provides instant feedback on your workout. Padded, textured rowing handle for better grip. Pivoting footplates with adjustable strap to secure feet. Folding frame for storage. Wheels for transport. Leveling endcaps with dial to ensure stability. Nylon rowing strap. Blue water tank. Padded seat. Targeted training: Full body strength and cardio. Weight capacity: 300 lbs.. Warranty: Three years on frame and 90 days on parts. Made from steel. Black finish. Minimal assembly required. 85.35 in. L x 20.25 in. W x 33.75 in. H (71.7 lbs.). Instruction Manual. Real Water Resistance: Because the Stamina Wave Water Rowing Machine incorporates water resistance, users will truly feel as though they are out on the lake or river. Water resistance makes the rowing stroke smoother and more consistent, but most importantly, it offers infinite resistance. Just like rowing on water, faster, harder pushes increase the resistance. To further increase or decrease the resistance, you can add or remove water with the included siphon. Even more, water in the reservoir mimics the sound of moving water, which makes the indoor rowing experience more lifelike. Built to Endure While Building Endurance: The Wave Water Rowing Machine is built to last no matter how often you use it. With steel frame construction and rowing beam, the rower can withstand years of prolonged, intense use. Even more, the sturdy, pivoting footplates with straps keep you secure during your workout while the rower itself is stabilized on leveling endcaps with dials. To further motivate you, the rower also comes equipped with a multi-function monitor that tracks dis
The advantages with air rowers is that there is smooth action; there is only small wear and tear to its mechanism; its automatic feature adjusts according to your rate of strokes; and there is a wide range of the resistance readily available in replicating the feel of rowing through the waters. The only disadvantage of this machine is that it tends to be noise indoors.

The machine was easy to put together and worked well mechanically. The problem is the electronic monitor. The strokes/min registered as double the actual pace, and the distance registered as 1/10th the actual distance. I contacted customer support via email and their response was slow and inadequate. I am returning the machine and plan to buy a WaterRower.
The machine is well constructed for a consumer device. The control panel does not accurately measure distance. It's off tenfold. I've contacted the manufacture about the issue and first I was told it should only be used for comparison purposes, then I was told it would be too expensive to provide a product that didn't show 1 km as 0.1km. Yes, these are ridiculous excuses.

Indoor rowing machines have come a long way and there are now a variety of sleek, highly-refined pieces of exercise equipment ready to get your cardio health on the upswing. Having a rower right there in your home can really be the push you need to get your muscles moving in a challenging yet comfortable way. Overall, rowing machines provide an outstanding way to increase fitness by burning calories and building muscle in a safe, low-impact way.

Assembled dimensions: 86L x 24W x 27H inches. Total body fitness - aerobic and resistance exercise. Folds and rolls for easy stora...ge. Easy-to-use monitor keeps you on track. Brushed stainless steel frame, some assembly required. Assembled weight: 200 lbs.. Manufacturer's warranty included (see product guarantee). Fabricated tubular steel frame with brushed finish - great for commercial or home useWater tank ensures smooth-gliding motion and is easy to maintainEasy-to-use training monitor tracks stroke rate, intensity, distance, and timeQuick assemble using only a 5mm Allen Key wrench (included)Smooth-gliding seat wheels mounted on durable rails for stable, easy movementHandlebars, seat, and footrest are comfortable and durableWorks 84 percent of muscle mass for maximum resultsCombines aerobic workout and resistance for total body reshapingManufacturer's warranty included: see complete details in the Product Guarantee areaDisclaimer:WaterRower will not provide support or documentation for any product transported outside of the original country of purchase. read more
The WaterRower Natural rowing machine is handcrafted in solid ash wood, stained Honey Oak, and finished with Danish oil. Wood is an excellent material for this application due to its ability to absorb sound and vibration enhancing the WaterRower's smooth, quiet operation. The Natural, as with all WaterRowers, features patented WaterFlywheel technology, unrivaled in its replication of the resistance felt in on the water rowing.

Some rowing enthusiasts claim that the disproportionate number of tall rowers is simply due to the unfair advantage that tall rowers have on the ergometer. This is due to the ergometer's inability to properly simulate the larger rowers drag on a boat due to weight. Since the ergometer is used to assess potential rowers, results on the ergometer machine play a large role in a rower's career success. Thus, many erg scores are weight-adjusted, as heavyweights typically find it easier to get better erg scores. Also, since crew selection has favored tall rowers long before the advent of the ergometer,[46][47] and bigger, taller crews are almost universally faster than smaller, shorter crews on the water, being tall is a definite advantage ultimately having little to do with the ergometer.
The WaterRower Natural Rowing Machine with S4 Monitor is hand crafted in solid Ash and stained Honey Oak for consistency of color.... Each rowing machine has been hand finished with Danish Oil giving a deep luster and warmth to the wood. Wood has been chosen due to its marvelous engineering properties, primary amongst these is its ability to absorb sound and vibration enhancing the WaterRower's smooth and quiet performance.;Flywheel sits in enclosed water tank to provide smooth, quiet, self-regulated resistanceSeries 4 performance monitor tracks workout intensity, stroke rate, heart rate, and moreHandcrafted rowing machine with inchwater flywheel inch that replicates actual rowing feelStores upright; measures 84 x 21 x 22 inches (W x H x D) and weighs 117 poundsStores upright; measures 84 x 21 x 22 inches (W x H x D) and weighs 117 pounds read more
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